1 Version 1.26.0 (2018-05-10)
2 ==========================
6 - [Closures now implement `Copy` and/or `Clone` if all captured variables
7 implement either or both traits.][49299]
8 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
9 - [Stablise `'_`. The underscore lifetime can be used anywhere where a
10 lifetime can be elided.][49458]
11 - [`impl Trait` is now stable allowing you to have abstract
12 return types.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
13 `fn open(path: impl AsRef<Path>)`.
14 - [Pattern matching will now automatically apply dereferences.][49394]
15 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
16 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
17 - [A lot of operations are now available in a const context.][46882] E.g. You
18 can now index into constant arrays, reference and deference into constants,
19 and use Tuple struct constructors.
20 - [Fixed entry slice patterns are now stable.][48516] e.g.
22 let points = [1, 2, 3, 4];
24 [1, 2, 3, 4] => println!("All points were sequential."),
25 _ => println!("Not all points were sequential."),
32 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
33 - [Fixed exponential projection complexity on nested types.][48296]
34 This can provide up to a ~12% reduction in compile times for certain crates.
35 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
36 to remap path prefixes outputted by the compiler.
37 - [Added `powerpc-unknown-netbsd` target.][48281]
41 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
42 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
43 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
44 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
45 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
46 - [`ascii::escape_default` is now available in libcore.][48735]
47 - [Trailing commas are now supported in std and core macros.][48056]
48 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
49 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
54 - [`*const T::copy_to_nonoverlapping`]
55 - [`*const T::copy_to`]
56 - [`*const T::read_unaligned`]
57 - [`*const T::read_volatile`]
60 - [`*const T::wrapping_add`]
61 - [`*const T::wrapping_sub`]
63 - [`*mut T::copy_to_nonoverlapping`]
65 - [`*mut T::read_unaligned`]
66 - [`*mut T::read_volatile`]
71 - [`*mut T::wrapping_add`]
72 - [`*mut T::wrapping_sub`]
73 - [`*mut T::write_bytes`]
74 - [`*mut T::write_unaligned`]
75 - [`*mut T::write_volatile`]
78 - [`FromUtf8Error::as_bytes`]
79 - [`LocalKey::try_with`]
81 - [`btree_map::Entry::and_modify`]
82 - [`fs::read_to_string`]
85 - [`hash_map::Entry::and_modify`]
86 - [`iter::FusedIterator`]
87 - [`ops::RangeInclusive`]
88 - [`ops::RangeToInclusive`]
90 - [`slice::rotate_left`]
91 - [`slice::rotate_right`]
97 - [Cargo will now output path to custom commands when `-v` is
98 passed with `--list`][cargo/5041]
99 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
100 - [`Cargo.lock` files are now included in published crates.][cargo/5093]
104 - [The second edition of "The Rust Programming Language" book is now recommended
105 over the first.][48404]
110 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
111 syntax is now invalid.
113 use std::ops::Fn as dyn;
114 fn g(_: Box<dyn(std::fmt::Debug)>) {}
116 - [The result of dereferences are no longer promoted to `'static`.][47408]
120 const PAIR: &(i32, i32) = &(0, 1);
121 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
124 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
125 - [`".e0"` will now no longer parse as `0.0` and will instead cause
127 - [Removed hoedown from rustdoc.][48274]
129 [46882]: https://github.com/rust-lang/rust/pull/46882
130 [47379]: https://github.com/rust-lang/rust/pull/47379
131 [47408]: https://github.com/rust-lang/rust/pull/47408
132 [47813]: https://github.com/rust-lang/rust/pull/47813
133 [48056]: https://github.com/rust-lang/rust/pull/48056
134 [48125]: https://github.com/rust-lang/rust/pull/48125
135 [48166]: https://github.com/rust-lang/rust/pull/48166
136 [48235]: https://github.com/rust-lang/rust/pull/48235
137 [48274]: https://github.com/rust-lang/rust/pull/48274
138 [48281]: https://github.com/rust-lang/rust/pull/48281
139 [48296]: https://github.com/rust-lang/rust/pull/48296
140 [48359]: https://github.com/rust-lang/rust/pull/48359
141 [48404]: https://github.com/rust-lang/rust/pull/48404
142 [48481]: https://github.com/rust-lang/rust/pull/48481
143 [48516]: https://github.com/rust-lang/rust/pull/48516
144 [48628]: https://github.com/rust-lang/rust/pull/48628
145 [48629]: https://github.com/rust-lang/rust/pull/48629
146 [48657]: https://github.com/rust-lang/rust/pull/48657
147 [48735]: https://github.com/rust-lang/rust/pull/48735
148 [48978]: https://github.com/rust-lang/rust/pull/48978
149 [49101]: https://github.com/rust-lang/rust/pull/49101
150 [49109]: https://github.com/rust-lang/rust/pull/49109
151 [49121]: https://github.com/rust-lang/rust/pull/49121
152 [49162]: https://github.com/rust-lang/rust/pull/49162
153 [49184]: https://github.com/rust-lang/rust/pull/49184
154 [49234]: https://github.com/rust-lang/rust/pull/49234
155 [49255]: https://github.com/rust-lang/rust/pull/49255
156 [49299]: https://github.com/rust-lang/rust/pull/49299
157 [49305]: https://github.com/rust-lang/rust/pull/49305
158 [49394]: https://github.com/rust-lang/rust/pull/49394
159 [49458]: https://github.com/rust-lang/rust/pull/49458
160 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
161 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
162 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
163 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
164 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
165 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
166 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
167 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
168 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
169 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
170 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
171 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
172 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
173 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
174 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
175 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
176 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
177 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
178 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
179 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
180 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
181 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
182 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
183 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
184 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
185 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
186 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
187 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
188 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
189 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
190 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
191 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
192 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
193 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
194 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
195 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
196 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
197 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
198 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
199 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
200 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
201 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
202 [cargo/5093]: https://github.com/rust-lang/cargo/pull/5093
205 Version 1.25.0 (2018-03-29)
206 ==========================
210 - [Stabilised `#[repr(align(x))]`.][47006] [RFC 1358]
211 - [You can now use nested groups of imports.][47948]
212 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
213 - [You can now have `|` at the start of a match arm.][47947] e.g.
221 | Foo::B => println!("AB"),
222 | Foo::C => println!("C"),
229 - [Upgraded to LLVM 6.][47828]
230 - [Added `-C lto=val` option.][47521]
231 - [Added `i586-unknown-linux-musl` target][47282]
235 - [Impl Send for `process::Command` on Unix.][47760]
236 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
237 - [`UnsafeCell::into_inner` is now safe.][47204]
238 - [Implement libstd for CloudABI.][47268]
239 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
240 - [Implement `AsRef<Path>` for Component][46985]
241 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
242 - [Moved `Duration` to libcore.][46666]
246 - [`Location::column`]
249 The following functions can now be used in a constant expression.
250 eg. `static MINUTE: Duration = Duration::from_secs(60);`
251 - [`Duration::new`][47300]
252 - [`Duration::from_secs`][47300]
253 - [`Duration::from_millis`][47300]
257 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
258 - [`cargo new` now defaults to creating a binary crate, instead of a
259 library crate.][cargo/5029]
263 - [Rust by example is now shipped with new releases][46196]
267 - [Deprecated `net::lookup_host`.][47510]
268 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
269 - The borrow checker was sometimes incorrectly permitting overlapping borrows
270 around indexing operations (see [#47349][47349]). This has been fixed (which also
271 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
272 - [Removed deprecated unstable attribute `#[simd]`.][47251]
274 [33903]: https://github.com/rust-lang/rust/pull/33903
275 [47947]: https://github.com/rust-lang/rust/pull/47947
276 [47948]: https://github.com/rust-lang/rust/pull/47948
277 [47760]: https://github.com/rust-lang/rust/pull/47760
278 [47790]: https://github.com/rust-lang/rust/pull/47790
279 [47828]: https://github.com/rust-lang/rust/pull/47828
280 [47398]: https://github.com/rust-lang/rust/pull/47398
281 [47510]: https://github.com/rust-lang/rust/pull/47510
282 [47521]: https://github.com/rust-lang/rust/pull/47521
283 [47204]: https://github.com/rust-lang/rust/pull/47204
284 [47251]: https://github.com/rust-lang/rust/pull/47251
285 [47268]: https://github.com/rust-lang/rust/pull/47268
286 [47282]: https://github.com/rust-lang/rust/pull/47282
287 [47300]: https://github.com/rust-lang/rust/pull/47300
288 [47349]: https://github.com/rust-lang/rust/pull/47349
289 [46931]: https://github.com/rust-lang/rust/pull/46931
290 [46985]: https://github.com/rust-lang/rust/pull/46985
291 [47006]: https://github.com/rust-lang/rust/pull/47006
292 [46830]: https://github.com/rust-lang/rust/pull/46830
293 [46095]: https://github.com/rust-lang/rust/pull/46095
294 [46666]: https://github.com/rust-lang/rust/pull/46666
295 [46196]: https://github.com/rust-lang/rust/pull/46196
296 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
297 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
298 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
299 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
300 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
303 Version 1.24.1 (2018-03-01)
304 ==========================
306 - [Do not abort when unwinding through FFI][48251]
307 - [Emit UTF-16 files for linker arguments on Windows][48318]
308 - [Make the error index generator work again][48308]
309 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
311 [48251]: https://github.com/rust-lang/rust/issues/48251
312 [48308]: https://github.com/rust-lang/rust/issues/48308
313 [48318]: https://github.com/rust-lang/rust/issues/48318
314 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
317 Version 1.24.0 (2018-02-15)
318 ==========================
322 - [External `sysv64` ffi is now available.][46528]
323 eg. `extern "sysv64" fn foo () {}`
327 - [rustc now uses 16 codegen units by default for release builds.][46910]
328 For the fastest builds, utilize `codegen-units=1`.
329 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
330 - [Add `aarch64-unknown-openbsd` support][46760]
334 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
335 improvement in performance in the majority of cases.
336 - [`OsStr`'s `Debug` implementation is now lossless and consistent
337 with Windows.][46798]
338 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
339 - [impl `From<bool>` for `AtomicBool`][46293]
340 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
341 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
342 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
343 - [float::from_bits now just uses transmute.][46012] This provides
344 some optimisations from LLVM.
345 - [Copied `AsciiExt` methods onto `char`][46077]
346 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
347 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
348 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
349 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
353 - [`RefCell::replace`]
355 - [`atomic::spin_loop_hint`]
357 The following functions can now be used in a constant expression.
358 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
360 - [`AtomicBool::new`][46287]
361 - [`AtomicUsize::new`][46287]
362 - [`AtomicIsize::new`][46287]
363 - [`AtomicPtr::new`][46287]
364 - [`Cell::new`][46287]
365 - [`{integer}::min_value`][46287]
366 - [`{integer}::max_value`][46287]
367 - [`mem::size_of`][46287]
368 - [`mem::align_of`][46287]
369 - [`ptr::null`][46287]
370 - [`ptr::null_mut`][46287]
371 - [`RefCell::new`][46287]
372 - [`UnsafeCell::new`][46287]
376 - [Added a `workspace.default-members` config that
377 overrides implied `--all` in virtual workspaces.][cargo/4743]
378 - [Enable incremental by default on development builds.][cargo/4817] Also added
379 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
380 per-project or global basis respectively.
387 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
388 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
389 in accordance with IETF RFC 4291 §2.2.
390 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
391 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
392 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
393 - [Leading zeros in tuple struct members is now an error][47084]
394 - [`column!()` macro is one-based instead of zero-based][46977]
395 - [`fmt::Arguments` can no longer be shared across threads][45198]
396 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
397 - [Cargo sets a different working directory for the compiler][cargo/4788]
399 [44884]: https://github.com/rust-lang/rust/pull/44884
400 [45198]: https://github.com/rust-lang/rust/pull/45198
401 [45506]: https://github.com/rust-lang/rust/pull/45506
402 [45904]: https://github.com/rust-lang/rust/pull/45904
403 [45990]: https://github.com/rust-lang/rust/pull/45990
404 [46012]: https://github.com/rust-lang/rust/pull/46012
405 [46077]: https://github.com/rust-lang/rust/pull/46077
406 [46094]: https://github.com/rust-lang/rust/pull/46094
407 [46284]: https://github.com/rust-lang/rust/pull/46284
408 [46287]: https://github.com/rust-lang/rust/pull/46287
409 [46293]: https://github.com/rust-lang/rust/pull/46293
410 [46528]: https://github.com/rust-lang/rust/pull/46528
411 [46671]: https://github.com/rust-lang/rust/pull/46671
412 [46713]: https://github.com/rust-lang/rust/pull/46713
413 [46735]: https://github.com/rust-lang/rust/pull/46735
414 [46749]: https://github.com/rust-lang/rust/pull/46749
415 [46760]: https://github.com/rust-lang/rust/pull/46760
416 [46798]: https://github.com/rust-lang/rust/pull/46798
417 [46828]: https://github.com/rust-lang/rust/pull/46828
418 [46831]: https://github.com/rust-lang/rust/pull/46831
419 [46833]: https://github.com/rust-lang/rust/pull/46833
420 [46910]: https://github.com/rust-lang/rust/pull/46910
421 [46977]: https://github.com/rust-lang/rust/pull/46977
422 [47018]: https://github.com/rust-lang/rust/pull/47018
423 [47080]: https://github.com/rust-lang/rust/pull/47080
424 [47084]: https://github.com/rust-lang/rust/pull/47084
425 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
426 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
427 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
428 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
429 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
430 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
433 Version 1.23.0 (2018-01-04)
434 ==========================
438 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
439 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
440 Which should fix some confusing errors in some operations.
444 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
445 undefined behaviour.][45920]
446 - [rustc now suggests renaming import if names clash.][45660]
447 - [Display errors/warnings correctly when there are zero-width or
448 wide characters.][45711]
449 - [rustc now avoids unnecessary copies of arguments that are
450 simple bindings][45380] This should improve memory usage on average by 5-10%.
451 - [Updated musl used to build musl rustc to 1.1.17][45393]
455 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
456 - [Implement Hash for raw pointers to unsized types][45483]
457 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
458 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
459 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
460 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
461 and `<*mut T>::as_mut`][44932]
462 - [Optimized `Thread::{park, unpark}` implementation][45524]
463 - [Improved `SliceExt::binary_search` performance.][45333]
464 - [impl `FromIterator<()>` for `()`][45379]
465 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
473 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
474 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
475 - [Added unit test checking to `cargo check`][cargo/4592]
476 - [Cargo now lets you install a specific version
477 using `cargo install --version`][cargo/4637]
481 - [Releases now ship with the Cargo book documentation.][45692]
482 - [rustdoc now prints rendering warnings on every run.][45324]
486 - [Changes have been made to type equality to make it more correct,
487 in rare cases this could break some code.][45853] [Tracking issue for
488 further information][45852]
489 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
490 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
491 Android 9, the minimum supported version is Android 14.
492 - [Bumped the minimum LLVM to 3.9][45326]
494 [44042]: https://github.com/rust-lang/rust/pull/44042
495 [44932]: https://github.com/rust-lang/rust/pull/44932
496 [45267]: https://github.com/rust-lang/rust/pull/45267
497 [45324]: https://github.com/rust-lang/rust/pull/45324
498 [45326]: https://github.com/rust-lang/rust/pull/45326
499 [45333]: https://github.com/rust-lang/rust/pull/45333
500 [45379]: https://github.com/rust-lang/rust/pull/45379
501 [45380]: https://github.com/rust-lang/rust/pull/45380
502 [45393]: https://github.com/rust-lang/rust/pull/45393
503 [45435]: https://github.com/rust-lang/rust/pull/45435
504 [45483]: https://github.com/rust-lang/rust/pull/45483
505 [45524]: https://github.com/rust-lang/rust/pull/45524
506 [45571]: https://github.com/rust-lang/rust/pull/45571
507 [45580]: https://github.com/rust-lang/rust/pull/45580
508 [45610]: https://github.com/rust-lang/rust/pull/45610
509 [45660]: https://github.com/rust-lang/rust/pull/45660
510 [45692]: https://github.com/rust-lang/rust/pull/45692
511 [45711]: https://github.com/rust-lang/rust/pull/45711
512 [45772]: https://github.com/rust-lang/rust/pull/45772
513 [45852]: https://github.com/rust-lang/rust/issues/45852
514 [45853]: https://github.com/rust-lang/rust/pull/45853
515 [45887]: https://github.com/rust-lang/rust/pull/45887
516 [45920]: https://github.com/rust-lang/rust/pull/45920
517 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
518 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
519 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
522 Version 1.22.1 (2017-11-22)
523 ==========================
525 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
527 [46183]: https://github.com/rust-lang/rust/pull/46183
529 Version 1.22.0 (2017-11-22)
530 ==========================
534 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
535 - [Now accepts underscores in unicode escapes][43716]
536 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
537 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
541 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
542 - [rustc will no longer inline in codegen units when compiling for debug][45075]
543 This should decrease compile times for debug builds.
544 - [strict memory alignment now enabled on ARMv6][45094]
545 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
549 - [Allow atomic operations up to 32 bits
550 on `armv5te_unknown_linux_gnueabi`][44978]
551 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
552 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
553 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
554 - [Properly detect overflow in `Instant += Duration`.][44220]
555 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
556 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
557 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
564 - [Cargo will now build multi file examples in subdirectories of the `examples`
565 folder that have a `main.rs` file.][cargo/4496]
566 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
567 the old format will continue to work and can be updated with `cargo update`.
568 - [Now supports vendoring git repositories][cargo/3992]
572 - [`libbacktrace` is now available on Apple platforms.][44251]
573 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
574 This now lets you specify that a given code example will fail to compile.
578 - [The minimum Android version that rustc can build for has been bumped
579 to `4.0` from `2.3`][45656]
580 - [Allowing `T op= &T` for numeric types has broken some type
581 inference cases][45480]
584 [42526]: https://github.com/rust-lang/rust/pull/42526
585 [43017]: https://github.com/rust-lang/rust/pull/43017
586 [43716]: https://github.com/rust-lang/rust/pull/43716
587 [43949]: https://github.com/rust-lang/rust/pull/43949
588 [44015]: https://github.com/rust-lang/rust/pull/44015
589 [44220]: https://github.com/rust-lang/rust/pull/44220
590 [44251]: https://github.com/rust-lang/rust/pull/44251
591 [44287]: https://github.com/rust-lang/rust/pull/44287
592 [44303]: https://github.com/rust-lang/rust/pull/44303
593 [44456]: https://github.com/rust-lang/rust/pull/44456
594 [44466]: https://github.com/rust-lang/rust/pull/44466
595 [44895]: https://github.com/rust-lang/rust/pull/44895
596 [44966]: https://github.com/rust-lang/rust/pull/44966
597 [44978]: https://github.com/rust-lang/rust/pull/44978
598 [45041]: https://github.com/rust-lang/rust/pull/45041
599 [45064]: https://github.com/rust-lang/rust/pull/45064
600 [45075]: https://github.com/rust-lang/rust/pull/45075
601 [45094]: https://github.com/rust-lang/rust/pull/45094
602 [45095]: https://github.com/rust-lang/rust/pull/45095
603 [45480]: https://github.com/rust-lang/rust/issues/45480
604 [45656]: https://github.com/rust-lang/rust/pull/45656
605 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
606 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
607 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
614 Version 1.21.0 (2017-10-12)
615 ==========================
619 - [You can now use static references for literals.][43838]
623 let x: &'static u32 = &0;
626 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
629 my_macro!(Vec<i32>::new); // Always worked
630 my_macro!(Vec::<i32>::new); // Now works
635 - [Upgraded jemalloc to 4.5.0][43911]
636 - [Enabled unwinding panics on Redox][43917]
637 - [Now runs LLVM in parallel during translation phase.][43506]
638 This should reduce peak memory usage.
642 - [Generate builtin impls for `Clone` for all arrays and tuples that
643 are `T: Clone`][43690]
644 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
645 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
646 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
651 [`std::mem::discriminant`]
655 - [You can now call `cargo install` with multiple package names][cargo/4216]
656 - [Cargo commands inside a virtual workspace will now implicitly
657 pass `--all`][cargo/4335]
658 - [Added a `[patch]` section to `Cargo.toml` to handle
659 prepublication dependencies][cargo/4123] [RFC 1969]
660 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
661 like patterns][cargo/4270]
662 - [Added the `--all-targets` option][cargo/4400]
663 - [Using required dependencies as a feature is now deprecated and emits
664 a warning][cargo/4364]
669 - [Cargo docs are moving][43916]
670 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
671 - [The rustdoc book is now available][43863]
672 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
673 - [Added a preview of RLS has been made available through rustup][44204]
674 Install with `rustup component add rls-preview`
675 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
676 Previously only showed `std::os::unix`.
680 - [Changes in method matching against higher-ranked types][43880] This may cause
681 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
682 - [rustc's JSON error output's byte position start at top of file.][42973]
683 Was previously relative to the rustc's internal `CodeMap` struct which
684 required the unstable library `libsyntax` to correctly use.
685 - [`unused_results` lint no longer ignores booleans][43728]
687 [42565]: https://github.com/rust-lang/rust/pull/42565
688 [42973]: https://github.com/rust-lang/rust/pull/42973
689 [43348]: https://github.com/rust-lang/rust/pull/43348
690 [43459]: https://github.com/rust-lang/rust/pull/43459
691 [43506]: https://github.com/rust-lang/rust/pull/43506
692 [43540]: https://github.com/rust-lang/rust/pull/43540
693 [43690]: https://github.com/rust-lang/rust/pull/43690
694 [43728]: https://github.com/rust-lang/rust/pull/43728
695 [43838]: https://github.com/rust-lang/rust/pull/43838
696 [43863]: https://github.com/rust-lang/rust/pull/43863
697 [43880]: https://github.com/rust-lang/rust/pull/43880
698 [43911]: https://github.com/rust-lang/rust/pull/43911
699 [43916]: https://github.com/rust-lang/rust/pull/43916
700 [43917]: https://github.com/rust-lang/rust/pull/43917
701 [44204]: https://github.com/rust-lang/rust/pull/44204
702 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
703 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
704 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
705 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
706 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
707 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
708 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
709 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
710 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
712 Version 1.20.0 (2017-08-31)
713 ===========================
717 - [Associated constants are now stabilised.][42809]
718 - [A lot of macro bugs are now fixed.][42913]
723 - [Struct fields are now properly coerced to the expected field type.][42807]
724 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
725 `wasm32-experimental-emscripten` target.
726 - [Changed some of the error messages to be more helpful.][42033]
727 - [Add support for RELRO(RELocation Read-Only) for platforms that support
729 - [rustc now reports the total number of errors on compilation failure][43015]
730 previously this was only the number of errors in the pass that failed.
731 - [Expansion in rustc has been sped up 29x.][42533]
732 - [added `msp430-none-elf` target.][43099]
733 - [rustc will now suggest one-argument enum variant to fix type mismatch when
735 - [Fixes backtraces on Redox][43228]
736 - [rustc now identifies different versions of same crate when absolute paths of
737 different types match in an error message.][42826]
743 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
744 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
746 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
747 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
748 - [Impl `Clone` for `DefaultHasher`.][42799]
749 - [Impl `Sync` for `SyncSender`.][42397]
750 - [Impl `FromStr` for `char`][42271]
751 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
753 - [allow messages in the `unimplemented!()` macro.][42155]
754 ie. `unimplemented!("Waiting for 1.21 to be stable")`
755 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
756 - [Upgrade to Unicode 10.0.0][42999]
757 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
758 - [Skip the main thread's manual stack guard on Linux][43072]
759 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
760 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
762 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
767 - [`CStr::into_c_string`]
768 - [`CString::as_c_str`]
769 - [`CString::into_boxed_c_str`]
772 - [`Chain::into_inner`]
773 - [`Option::get_or_insert_with`]
774 - [`Option::get_or_insert`]
775 - [`OsStr::into_os_string`]
776 - [`OsString::into_boxed_os_str`]
779 - [`Utf8Error::error_len`]
780 - [`char::EscapeDebug`]
781 - [`char::escape_debug`]
787 - [`mem::ManuallyDrop`]
788 - [`slice::sort_unstable_by_key`]
789 - [`slice::sort_unstable_by`]
790 - [`slice::sort_unstable`]
791 - [`str::from_boxed_utf8_unchecked`]
792 - [`str::as_bytes_mut`]
793 - [`str::as_bytes_mut`]
794 - [`str::from_utf8_mut`]
795 - [`str::from_utf8_unchecked_mut`]
797 - [`str::get_unchecked_mut`]
798 - [`str::get_unchecked`]
800 - [`str::into_boxed_bytes`]
805 - [Cargo API token location moved from `~/.cargo/config` to
806 `~/.cargo/credentials`.][cargo/3978]
807 - [Cargo will now build `main.rs` binaries that are in sub-directories of
808 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
809 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
810 - [You can now specify version of a binary when installed through
811 `cargo install` using `--vers`.][cargo/4229]
812 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
813 failure.][cargo/4248]
814 - [Changed the convention around which file is the crate root.][cargo/4259]
815 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
816 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
821 - [Functions with `'static` in their return types will now not be as usable as
822 if they were using lifetime parameters instead.][42417]
823 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
824 takes the sign of NaN into account where previously didn't.][42430]
826 [42033]: https://github.com/rust-lang/rust/pull/42033
827 [42155]: https://github.com/rust-lang/rust/pull/42155
828 [42271]: https://github.com/rust-lang/rust/pull/42271
829 [42397]: https://github.com/rust-lang/rust/pull/42397
830 [42417]: https://github.com/rust-lang/rust/pull/42417
831 [42430]: https://github.com/rust-lang/rust/pull/42430
832 [42431]: https://github.com/rust-lang/rust/pull/42431
833 [42533]: https://github.com/rust-lang/rust/pull/42533
834 [42571]: https://github.com/rust-lang/rust/pull/42571
835 [42613]: https://github.com/rust-lang/rust/pull/42613
836 [42799]: https://github.com/rust-lang/rust/pull/42799
837 [42807]: https://github.com/rust-lang/rust/pull/42807
838 [42809]: https://github.com/rust-lang/rust/pull/42809
839 [42822]: https://github.com/rust-lang/rust/pull/42822
840 [42826]: https://github.com/rust-lang/rust/pull/42826
841 [42854]: https://github.com/rust-lang/rust/pull/42854
842 [42913]: https://github.com/rust-lang/rust/pull/42913
843 [42999]: https://github.com/rust-lang/rust/pull/42999
844 [43011]: https://github.com/rust-lang/rust/pull/43011
845 [43015]: https://github.com/rust-lang/rust/pull/43015
846 [43072]: https://github.com/rust-lang/rust/pull/43072
847 [43077]: https://github.com/rust-lang/rust/pull/43077
848 [43097]: https://github.com/rust-lang/rust/pull/43097
849 [43099]: https://github.com/rust-lang/rust/pull/43099
850 [43170]: https://github.com/rust-lang/rust/pull/43170
851 [43178]: https://github.com/rust-lang/rust/pull/43178
852 [43185]: https://github.com/rust-lang/rust/pull/43185
853 [43228]: https://github.com/rust-lang/rust/pull/43228
854 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
855 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
856 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
857 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
858 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
859 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
860 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
861 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
862 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
863 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
864 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
865 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
866 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
867 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
868 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
869 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
870 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
871 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
872 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
873 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
874 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
875 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
876 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
877 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
878 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
879 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
880 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
881 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
882 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
883 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
884 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
885 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
886 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
887 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
888 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
889 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
890 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
891 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
892 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
895 Version 1.19.0 (2017-07-20)
896 ===========================
901 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
902 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
903 - [Macro recursion limit increased to 1024 from 64.][41676]
904 - [Added lint for detecting unused macros.][41907]
905 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
906 For example: `let x = loop { break 7; };`
907 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
908 contain `Copy` types and cannot have a `Drop` implementation.
909 Example: `union Foo { bar: u8, baz: usize }`
910 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
911 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
916 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
917 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
918 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
919 you should use `--target armv7-linux-androideabi`.
920 - [Fixed ICE when removing a source file between compilation sessions.][41873]
921 - [Minor optimisation of string operations.][42037]
922 - [Compiler error message is now `aborting due to previous error(s)` instead of
923 `aborting due to N previous errors`][42150] This was previously inaccurate and
924 would only count certain kinds of errors.
925 - [The compiler now supports Visual Studio 2017][42225]
926 - [The compiler is now built against LLVM 4.0.1 by default][42948]
927 - [Added a lot][42264] of [new error codes][42302]
928 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
929 libraries with C Run-time Libraries(CRT) to be statically linked.
930 - [Fixed various ARM codegen bugs][42740]
935 - [`String` now implements `FromIterator<Cow<'a, str>>` and
936 `Extend<Cow<'a, str>>`][41449]
937 - [`Vec` now implements `From<&mut [T]>`][41530]
938 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
939 - [`SplitWhitespace` now implements `Clone`][41659]
940 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
942 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
943 macros, but for printing to stderr.
948 - [`OsString::shrink_to_fit`]
951 - [`thread::ThreadId`]
956 - [Build scripts can now add environment variables to the environment
957 the crate is being compiled in.
958 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
959 - [Subcommands now replace the current process rather than spawning a new
960 child process][cargo/3970]
961 - [Workspace members can now accept glob file patterns][cargo/3979]
962 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
963 the members in a given workspace.][cargo/3988]
964 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
965 - [Target directory path is now in the cargo metadata][cargo/4022]
966 - [Cargo no longer checks out a local working directory for the
967 crates.io index][cargo/4026] This should provide smaller file size for the
968 registry, and improve cloning times, especially on Windows machines.
969 - [Added an `--exclude` option for excluding certain packages when using the
970 `--all` option][cargo/4031]
971 - [Cargo will now automatically retry when receiving a 5xx error
972 from crates.io][cargo/4032]
973 - [The `--features` option now accepts multiple comma or space
974 delimited values.][cargo/4084]
975 - [Added support for custom target specific runners][cargo/3954]
980 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
982 - [Rust will now release XZ compressed packages][rust-installer/57]
983 - [rustup will now prefer to download rust packages with
984 XZ compression][rustup/1100] over GZip packages.
985 - [Added the ability to escape `#` in rust documentation][41785] By adding
986 additional `#`'s ie. `##` is now `#`
991 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
992 - [`-Z` flags are now no longer allowed to be used on the stable
993 compiler.][41751] This has been a warning for a year previous to this.
994 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
995 longer works][42844]. Users should migrate to the built-in `check`
996 command, which has been available since 1.16.
997 - [Ending a float literal with `._` is now a hard error.
998 Example: `42._` .][41946]
999 - [Any use of a private `extern crate` outside of its module is now a
1000 hard error.][36886] This was previously a warning.
1001 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1002 relative while the `::` prefix makes a path absolute, but was ignored and the
1003 path was relative regardless.
1004 - [Floating point constants in match patterns is now a hard error][36890]
1005 This was previously a warning.
1006 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1007 match patterns is now a hard error][36891] This was previously a warning.
1008 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1010 - [From the pound escape, lines consisting of multiple `#`s are
1012 - [It is an error to re-export private enum variants][42460]. This is
1013 known to break a number of crates that depend on an older version of
1015 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1016 to use it to find the linker, and the build will fail where it did
1017 not previously][42607]
1019 [36886]: https://github.com/rust-lang/rust/issues/36886
1020 [36888]: https://github.com/rust-lang/rust/issues/36888
1021 [36890]: https://github.com/rust-lang/rust/issues/36890
1022 [36891]: https://github.com/rust-lang/rust/issues/36891
1023 [36892]: https://github.com/rust-lang/rust/issues/36892
1024 [37406]: https://github.com/rust-lang/rust/issues/37406
1025 [39983]: https://github.com/rust-lang/rust/pull/39983
1026 [41145]: https://github.com/rust-lang/rust/pull/41145
1027 [41192]: https://github.com/rust-lang/rust/pull/41192
1028 [41258]: https://github.com/rust-lang/rust/pull/41258
1029 [41370]: https://github.com/rust-lang/rust/pull/41370
1030 [41449]: https://github.com/rust-lang/rust/pull/41449
1031 [41530]: https://github.com/rust-lang/rust/pull/41530
1032 [41624]: https://github.com/rust-lang/rust/pull/41624
1033 [41656]: https://github.com/rust-lang/rust/pull/41656
1034 [41659]: https://github.com/rust-lang/rust/pull/41659
1035 [41676]: https://github.com/rust-lang/rust/pull/41676
1036 [41751]: https://github.com/rust-lang/rust/pull/41751
1037 [41764]: https://github.com/rust-lang/rust/pull/41764
1038 [41785]: https://github.com/rust-lang/rust/pull/41785
1039 [41873]: https://github.com/rust-lang/rust/pull/41873
1040 [41907]: https://github.com/rust-lang/rust/pull/41907
1041 [41946]: https://github.com/rust-lang/rust/pull/41946
1042 [42016]: https://github.com/rust-lang/rust/pull/42016
1043 [42037]: https://github.com/rust-lang/rust/pull/42037
1044 [42068]: https://github.com/rust-lang/rust/pull/42068
1045 [42150]: https://github.com/rust-lang/rust/pull/42150
1046 [42162]: https://github.com/rust-lang/rust/pull/42162
1047 [42225]: https://github.com/rust-lang/rust/pull/42225
1048 [42264]: https://github.com/rust-lang/rust/pull/42264
1049 [42302]: https://github.com/rust-lang/rust/pull/42302
1050 [42460]: https://github.com/rust-lang/rust/issues/42460
1051 [42607]: https://github.com/rust-lang/rust/issues/42607
1052 [42740]: https://github.com/rust-lang/rust/pull/42740
1053 [42844]: https://github.com/rust-lang/rust/issues/42844
1054 [42948]: https://github.com/rust-lang/rust/pull/42948
1055 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1056 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1057 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1058 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1059 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1060 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1061 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1062 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1063 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1064 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1065 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1066 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1067 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1068 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1069 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1070 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1071 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1072 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1073 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1074 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1075 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1076 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1079 Version 1.18.0 (2017-06-08)
1080 ===========================
1085 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1086 make the item visible to just that module tree. Also accepts the keyword
1087 `crate` to make something public to the whole crate but not users of the
1088 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1089 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1090 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1091 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1092 types like `Write + Send`, trailing `+` are now supported in trait objects,
1093 and better error reporting for trait objects starting with `?Sized`.
1094 - [0e+10 is now a valid floating point literal][40589]
1095 - [Now warns if you bind a lifetime parameter to 'static][40734]
1096 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1097 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1098 representation in some cases.][40377]
1103 - [rustc can now emit mir with `--emit mir`][39891]
1104 - [Improved LLVM IR for trivial functions][40367]
1105 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1106 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1107 opportunities found through profiling
1108 - [Improved backtrace formatting when panicking][38165]
1113 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1114 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1115 iteration or reallocation.
1116 - [Simplified HashMap Bucket interface][40561] provides performance
1117 improvements for iterating and cloning.
1118 - [Specialize Vec::from_elem to use calloc][40409]
1119 - [Fixed Race condition in fs::create_dir_all][39799]
1120 - [No longer caching stdio on Windows][40516]
1121 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1122 2.50%~ faster and in one case now 12.50% faster.
1123 - [Optimized `AtomicBool::fetch_nand`][41143]
1128 - [`Child::try_wait`]
1129 - [`HashMap::retain`]
1130 - [`HashSet::retain`]
1132 - [`TcpStream::peek`]
1133 - [`UdpSocket::peek`]
1134 - [`UdpSocket::peek_from`]
1139 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1140 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1141 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1142 - [Added Android build support][cargo/3885]
1143 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1144 of a certain type, for example `cargo build --bins` will build all
1146 - [Added support for haiku][cargo/3952]
1151 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1152 - [Added rust-windbg script for better debugging on Windows][39983]
1153 - [Rust now uses the official cross compiler for NetBSD][40612]
1154 - [rustdoc now accepts `#` at the start of files][40828]
1155 - [Fixed jemalloc support for musl][41168]
1160 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1161 always placed after the sign if it exists and before the digits. With the `#`
1162 flag the zeroes are placed after the prefix and before the digits.
1163 - [Due to the struct field optimisation][40377], using `transmute` on structs
1164 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1165 always been undefined behavior, but is now more likely to break in practice.
1166 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1167 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1168 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1169 - [Overlapping inherent `impl`s are now a hard error][40728]
1170 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1171 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1172 `out.asm` and `out.ll` instead of only one of the filetypes.
1173 - [ calling a function that returns `Self` will no longer work][41805] when
1174 the size of `Self` cannot be statically determined.
1175 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1176 this has caused a few regressions namely:
1178 - Changed the link order of local static/dynamic libraries (respecting the
1179 order on given rather than having the compiler reorder).
1180 - Changed how MinGW is linked, native code linked to dynamic libraries
1181 may require manually linking to the gcc support library (for the native
1184 [38165]: https://github.com/rust-lang/rust/pull/38165
1185 [39799]: https://github.com/rust-lang/rust/pull/39799
1186 [39891]: https://github.com/rust-lang/rust/pull/39891
1187 [39983]: https://github.com/rust-lang/rust/pull/39983
1188 [40043]: https://github.com/rust-lang/rust/pull/40043
1189 [40241]: https://github.com/rust-lang/rust/pull/40241
1190 [40338]: https://github.com/rust-lang/rust/pull/40338
1191 [40367]: https://github.com/rust-lang/rust/pull/40367
1192 [40377]: https://github.com/rust-lang/rust/pull/40377
1193 [40409]: https://github.com/rust-lang/rust/pull/40409
1194 [40516]: https://github.com/rust-lang/rust/pull/40516
1195 [40556]: https://github.com/rust-lang/rust/pull/40556
1196 [40561]: https://github.com/rust-lang/rust/pull/40561
1197 [40589]: https://github.com/rust-lang/rust/pull/40589
1198 [40612]: https://github.com/rust-lang/rust/pull/40612
1199 [40723]: https://github.com/rust-lang/rust/pull/40723
1200 [40728]: https://github.com/rust-lang/rust/pull/40728
1201 [40731]: https://github.com/rust-lang/rust/pull/40731
1202 [40734]: https://github.com/rust-lang/rust/pull/40734
1203 [40805]: https://github.com/rust-lang/rust/pull/40805
1204 [40807]: https://github.com/rust-lang/rust/pull/40807
1205 [40828]: https://github.com/rust-lang/rust/pull/40828
1206 [40870]: https://github.com/rust-lang/rust/pull/40870
1207 [41085]: https://github.com/rust-lang/rust/pull/41085
1208 [41143]: https://github.com/rust-lang/rust/pull/41143
1209 [41168]: https://github.com/rust-lang/rust/pull/41168
1210 [41270]: https://github.com/rust-lang/rust/issues/41270
1211 [41469]: https://github.com/rust-lang/rust/pull/41469
1212 [41805]: https://github.com/rust-lang/rust/issues/41805
1213 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1214 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1215 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1216 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1217 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1218 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1219 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1220 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1221 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1222 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1223 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1224 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1225 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1226 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1229 Version 1.17.0 (2017-04-27)
1230 ===========================
1235 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1236 * [Fields of structs may be initialized without duplicating the field/variable
1237 names][39761]. [RFC 1682]
1238 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1239 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1240 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1241 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1242 `'b`. Soundness fix.
1243 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1244 * [Static variables may contain references to other statics][40027]
1249 * [Exit quickly on only `--emit dep-info`][40336]
1250 * [Make `-C relocation-model` more correctly determine whether the linker
1251 creates a position-independent executable][40245]
1252 * [Add `-C overflow-checks` to directly control whether integer overflow
1254 * [The rustc type checker now checks items on demand instead of in a single
1255 in-order pass][40008]. This is mostly an internal refactoring in support of
1256 future work, including incremental type checking, but also resolves [RFC
1257 1647], allowing `Self` to appear in `impl` `where` clauses.
1258 * [Optimize vtable loads][39995]
1259 * [Turn off vectorization for Emscripten targets][39990]
1260 * [Provide suggestions for unknown macros imported with `use`][39953]
1261 * [Fix ICEs in path resolution][39939]
1262 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1263 * [Add clearer error message using `&str + &str`][39116]
1274 * [`Ordering::then`]
1275 * [`Ordering::then_with`]
1276 * [`BTreeMap::range`]
1277 * [`BTreeMap::range_mut`]
1278 * [`collections::Bound`]
1279 * [`process::abort`]
1280 * [`ptr::read_unaligned`]
1281 * [`ptr::write_unaligned`]
1282 * [`Result::expect_err`]
1285 * [`Cell::into_inner`]
1291 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1292 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1293 * [`String` implements `FromIterator<&char>`][40028]
1294 * `Box` [implements][40009] a number of new conversions:
1295 `From<Box<str>> for String`,
1296 `From<Box<[T]>> for Vec<T>`,
1297 `From<Box<CStr>> for CString`,
1298 `From<Box<OsStr>> for OsString`,
1299 `From<Box<Path>> for PathBuf`,
1300 `Into<Box<str>> for String`,
1301 `Into<Box<[T]>> for Vec<T>`,
1302 `Into<Box<CStr>> for CString`,
1303 `Into<Box<OsStr>> for OsString`,
1304 `Into<Box<Path>> for PathBuf`,
1305 `Default for Box<str>`,
1306 `Default for Box<CStr>`,
1307 `Default for Box<OsStr>`,
1308 `From<&CStr> for Box<CStr>`,
1309 `From<&OsStr> for Box<OsStr>`,
1310 `From<&Path> for Box<Path>`
1311 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1312 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1313 * [Slightly optimize `slice::sort`][39538]
1314 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1315 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1316 `Box<str>` implements `From<&str>`][39438]
1317 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1318 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1319 * [`format!` estimates the needed capacity before writing a string][39356]
1320 * [Support unprivileged symlink creation in Windows][38921]
1321 * [`PathBuf` implements `Default`][38764]
1322 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1323 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1324 and poor hash functions.
1329 * [Add `cargo check --all`][cargo/3731]
1330 * [Add an option to ignore SSL revocation checking][cargo/3699]
1331 * [Add `cargo run --package`][cargo/3691]
1332 * [Add `required_features`][cargo/3667]
1333 * [Assume `build.rs` is a build script][cargo/3664]
1334 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1339 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1341 * [The "Unstable Book" documents nightly-only features][ubook]
1342 * [Improve the style of the sidebar in rustdoc output][40265]
1343 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1344 * [Fix MSP430 breakage due to `i128`][40257]
1345 * [Preliminary Solaris/SPARCv9 support][39903]
1346 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1347 run without installing the MSVC runtime.
1348 * [`rustdoc --test` includes file names in test names][39788]
1349 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1350 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1351 * [Initial support for `aarch64-unknown-freebsd`][39491]
1352 * [Initial support for `i686-unknown-netbsd`][39426]
1353 * [This release no longer includes the old makefile build system][39431]. Rust
1354 is built with a custom build system, written in Rust, and with Cargo.
1355 * [Add Debug implementations for libcollection structs][39002]
1356 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1357 * [`--test-threads=0` produces an error][38945]
1358 * [`rustup` installs documentation by default][40526]
1359 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1360 WinDbg and Visual Studio to improve the debugging experience.
1365 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1366 workaround, either use MSVC 2015 or run vcvars.bat.
1367 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1368 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1369 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1371 * [`format!` and `Display::to_string` panic if an underlying formatting
1372 implementation returns an error][40117]. Previously the error was silently
1373 ignored. It is incorrect for `write_fmt` to return an error when writing
1375 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1376 crates were marked stable and could be accessed from the stable toolchain.
1377 * [Rust git source no longer includes vendored crates][39728]. Those that need
1378 to build with vendored crates should build from release tarballs.
1379 * [Fix inert attributes from `proc_macro_derives`][39572]
1380 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1381 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1383 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1384 existing code generally ignores the type of dead-code unless a type-hint is
1385 provided; this can cause surprising inference interactions particularly around
1386 defaulting. The new code uniformly ignores the result type of dead-code.
1387 * [Tuple-struct constructors with private fields are no longer visible][38932]
1388 * [Lifetime parameters that do not appear in the arguments are now considered
1389 early-bound][38897], resolving a soundness bug (#[32330]). The
1390 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1392 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1393 * [Make transmuting from fn item types to pointer-sized types a hard
1396 [27787]: https://github.com/rust-lang/rust/issues/27787
1397 [32330]: https://github.com/rust-lang/rust/issues/32330
1398 [34198]: https://github.com/rust-lang/rust/pull/34198
1399 [38161]: https://github.com/rust-lang/rust/pull/38161
1400 [38368]: https://github.com/rust-lang/rust/pull/38368
1401 [38584]: https://github.com/rust-lang/rust/issues/38584
1402 [38661]: https://github.com/rust-lang/rust/pull/38661
1403 [38764]: https://github.com/rust-lang/rust/pull/38764
1404 [38864]: https://github.com/rust-lang/rust/issues/38864
1405 [38897]: https://github.com/rust-lang/rust/pull/38897
1406 [38921]: https://github.com/rust-lang/rust/pull/38921
1407 [38932]: https://github.com/rust-lang/rust/pull/38932
1408 [38945]: https://github.com/rust-lang/rust/pull/38945
1409 [38981]: https://github.com/rust-lang/rust/pull/38981
1410 [39002]: https://github.com/rust-lang/rust/pull/39002
1411 [39116]: https://github.com/rust-lang/rust/pull/39116
1412 [39193]: https://github.com/rust-lang/rust/pull/39193
1413 [39265]: https://github.com/rust-lang/rust/pull/39265
1414 [39356]: https://github.com/rust-lang/rust/pull/39356
1415 [39372]: https://github.com/rust-lang/rust/pull/39372
1416 [39426]: https://github.com/rust-lang/rust/pull/39426
1417 [39431]: https://github.com/rust-lang/rust/pull/39431
1418 [39438]: https://github.com/rust-lang/rust/pull/39438
1419 [39440]: https://github.com/rust-lang/rust/pull/39440
1420 [39485]: https://github.com/rust-lang/rust/pull/39485
1421 [39491]: https://github.com/rust-lang/rust/pull/39491
1422 [39518]: https://github.com/rust-lang/rust/pull/39518
1423 [39538]: https://github.com/rust-lang/rust/pull/39538
1424 [39572]: https://github.com/rust-lang/rust/pull/39572
1425 [39633]: https://github.com/rust-lang/rust/pull/39633
1426 [39642]: https://github.com/rust-lang/rust/pull/39642
1427 [39728]: https://github.com/rust-lang/rust/pull/39728
1428 [39761]: https://github.com/rust-lang/rust/pull/39761
1429 [39788]: https://github.com/rust-lang/rust/pull/39788
1430 [39793]: https://github.com/rust-lang/rust/pull/39793
1431 [39837]: https://github.com/rust-lang/rust/pull/39837
1432 [39843]: https://github.com/rust-lang/rust/pull/39843
1433 [39851]: https://github.com/rust-lang/rust/pull/39851
1434 [39903]: https://github.com/rust-lang/rust/pull/39903
1435 [39939]: https://github.com/rust-lang/rust/pull/39939
1436 [39953]: https://github.com/rust-lang/rust/pull/39953
1437 [39960]: https://github.com/rust-lang/rust/pull/39960
1438 [39990]: https://github.com/rust-lang/rust/pull/39990
1439 [39995]: https://github.com/rust-lang/rust/pull/39995
1440 [40008]: https://github.com/rust-lang/rust/pull/40008
1441 [40009]: https://github.com/rust-lang/rust/pull/40009
1442 [40027]: https://github.com/rust-lang/rust/pull/40027
1443 [40028]: https://github.com/rust-lang/rust/pull/40028
1444 [40037]: https://github.com/rust-lang/rust/pull/40037
1445 [40117]: https://github.com/rust-lang/rust/pull/40117
1446 [40166]: https://github.com/rust-lang/rust/pull/40166
1447 [40245]: https://github.com/rust-lang/rust/pull/40245
1448 [40257]: https://github.com/rust-lang/rust/pull/40257
1449 [40261]: https://github.com/rust-lang/rust/pull/40261
1450 [40265]: https://github.com/rust-lang/rust/pull/40265
1451 [40319]: https://github.com/rust-lang/rust/pull/40319
1452 [40336]: https://github.com/rust-lang/rust/pull/40336
1453 [40526]: https://github.com/rust-lang/rust/pull/40526
1454 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1455 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1456 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1457 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1458 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1459 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1460 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1461 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1462 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1463 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1464 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1465 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1466 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1467 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1468 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1469 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1470 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1471 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1472 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1473 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1474 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1475 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1476 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1477 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1478 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1479 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1480 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1481 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1482 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1483 [mdbook]: https://crates.io/crates/mdbook
1484 [ubook]: https://doc.rust-lang.org/unstable-book/
1487 Version 1.16.0 (2017-03-16)
1488 ===========================
1493 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1494 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1495 match patterns][38069]
1496 * [Clean up semantics of `self` in an import list][38313]
1497 * [`Self` may appear in `impl` headers][38920]
1498 * [`Self` may appear in struct expressions][39282]
1503 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1504 a `.rmeta` file containing only crate metadata][38571]. This can be
1505 used by tools like the Rust Language Service to perform
1506 metadata-only builds.
1507 * [Levenshtein based typo suggestions now work in most places, while
1508 previously they worked only for fields and sometimes for local
1509 variables][38927]. Together with the overhaul of "no
1510 resolution"/"unexpected resolution" errors (#[38154]) they result in
1511 large and systematic improvement in resolution diagnostics.
1512 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1514 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1515 * [`rustc` no longer attempts to provide "consider using an explicit
1516 lifetime" suggestions][37057]. They were inaccurate.
1521 * [`VecDeque::truncate`]
1522 * [`VecDeque::resize`]
1523 * [`String::insert_str`]
1524 * [`Duration::checked_add`]
1525 * [`Duration::checked_sub`]
1526 * [`Duration::checked_div`]
1527 * [`Duration::checked_mul`]
1530 * [`SocketAddr::is_ipv4`]
1531 * [`SocketAddr::is_ipv6`]
1532 * [`IpAddr::is_ipv4`]
1533 * [`IpAddr::is_ipv6`]
1535 * [`Vec::dedup_by_key`]
1536 * [`Result::unwrap_or_default`]
1537 * [`<*const T>::wrapping_offset`]
1538 * [`<*mut T>::wrapping_offset`]
1539 * `CommandExt::creation_flags`
1540 * [`File::set_permissions`]
1541 * [`String::split_off`]
1546 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1547 their argument by `Borrow` parameter][37761]
1548 * [All public types in std implement `Debug`][38006]
1549 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1550 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1551 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1553 * [std: Fix partial writes in `LineWriter`][38062]
1554 * [std: Clamp max read/write sizes on Unix][38062]
1555 * [Use more specific panic message for `&str` slicing errors][38066]
1556 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1557 functionality cannot be achieved in std currently.
1558 * [`writeln!`, like `println!`, now accepts a form with no string
1559 or formatting arguments, to just print a newline][38469]
1560 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1561 * [Reduce the size of static data in `std_unicode::tables`][38781]
1562 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1563 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1565 * [`Duration` implements `Sum`][38712]
1566 * [`String` implements `ToSocketAddrs`][39048]
1571 * [The `cargo check` command does a type check of a project without
1572 building it][cargo/3296]
1573 * [crates.io will display CI badges from Travis and AppVeyor, if
1574 specified in Cargo.toml][cargo/3546]
1575 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1576 * [Compilation profiles accept integer values for `debug`, in addition
1577 to `true` and `false`. These are passed to `rustc` as the value to
1578 `-C debuginfo`][cargo/3534]
1579 * [Implement `cargo --version --verbose`][cargo/3604]
1580 * [All builds now output 'dep-info' build dependencies compatible with
1581 make and ninja][cargo/3557]
1582 * [Build all workspace members with `build --all`][cargo/3511]
1583 * [Document all workspace members with `doc --all`][cargo/3515]
1584 * [Path deps outside workspace are not members][cargo/3443]
1589 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1590 the path to the Rust implementation][38589]
1591 * [The `armv7-linux-androideabi` target no longer enables NEON
1592 extensions, per Google's ABI guide][38413]
1593 * [The stock standard library can be compiled for Redox OS][38401]
1594 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1596 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1598 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1603 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1604 match patterns][38069]
1605 * In this release, references to uninhabited types can not be
1606 pattern-matched. This was accidentally allowed in 1.15.
1607 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1608 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1610 * [Clean up semantics of `self` in an import list][38313]
1611 * Reimplemented lifetime elision. This change was almost entirely compatible
1612 with existing code, but it did close a number of small bugs and loopholes,
1613 as well as being more accepting in some other [cases][41105].
1615 [37057]: https://github.com/rust-lang/rust/pull/37057
1616 [37761]: https://github.com/rust-lang/rust/pull/37761
1617 [38006]: https://github.com/rust-lang/rust/pull/38006
1618 [38051]: https://github.com/rust-lang/rust/pull/38051
1619 [38062]: https://github.com/rust-lang/rust/pull/38062
1620 [38062]: https://github.com/rust-lang/rust/pull/38622
1621 [38066]: https://github.com/rust-lang/rust/pull/38066
1622 [38069]: https://github.com/rust-lang/rust/pull/38069
1623 [38131]: https://github.com/rust-lang/rust/pull/38131
1624 [38154]: https://github.com/rust-lang/rust/pull/38154
1625 [38274]: https://github.com/rust-lang/rust/pull/38274
1626 [38304]: https://github.com/rust-lang/rust/pull/38304
1627 [38313]: https://github.com/rust-lang/rust/pull/38313
1628 [38314]: https://github.com/rust-lang/rust/pull/38314
1629 [38327]: https://github.com/rust-lang/rust/pull/38327
1630 [38401]: https://github.com/rust-lang/rust/pull/38401
1631 [38413]: https://github.com/rust-lang/rust/pull/38413
1632 [38469]: https://github.com/rust-lang/rust/pull/38469
1633 [38559]: https://github.com/rust-lang/rust/pull/38559
1634 [38571]: https://github.com/rust-lang/rust/pull/38571
1635 [38580]: https://github.com/rust-lang/rust/pull/38580
1636 [38589]: https://github.com/rust-lang/rust/pull/38589
1637 [38670]: https://github.com/rust-lang/rust/pull/38670
1638 [38712]: https://github.com/rust-lang/rust/pull/38712
1639 [38726]: https://github.com/rust-lang/rust/pull/38726
1640 [38781]: https://github.com/rust-lang/rust/pull/38781
1641 [38798]: https://github.com/rust-lang/rust/pull/38798
1642 [38909]: https://github.com/rust-lang/rust/pull/38909
1643 [38920]: https://github.com/rust-lang/rust/pull/38920
1644 [38927]: https://github.com/rust-lang/rust/pull/38927
1645 [39048]: https://github.com/rust-lang/rust/pull/39048
1646 [39282]: https://github.com/rust-lang/rust/pull/39282
1647 [39379]: https://github.com/rust-lang/rust/pull/39379
1648 [41105]: https://github.com/rust-lang/rust/issues/41105
1649 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1650 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1651 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
1652 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
1653 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
1654 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
1655 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
1656 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
1657 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
1658 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
1659 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
1660 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
1661 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
1662 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
1663 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
1664 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
1665 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
1666 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
1667 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
1668 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
1669 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
1670 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
1671 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
1672 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
1673 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
1674 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
1675 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
1676 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
1677 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
1678 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1681 Version 1.15.1 (2017-02-09)
1682 ===========================
1684 * [Fix IntoIter::as_mut_slice's signature][39466]
1685 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
1687 [39466]: https://github.com/rust-lang/rust/pull/39466
1688 [39523]: https://github.com/rust-lang/rust/pull/39523
1691 Version 1.15.0 (2017-02-02)
1692 ===========================
1697 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
1698 stable. This allows popular code-generating crates like Serde and Diesel to
1699 work ergonomically. [RFC 1681].
1700 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
1701 with curly braces][36868]. Part of [RFC 1506].
1702 * [A number of minor changes to name resolution have been activated][37127].
1703 They add up to more consistent semantics, allowing for future evolution of
1704 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1705 details of what is different. The breaking changes here have been transitioned
1706 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1707 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
1709 * [`?Sized` can be used in `where` clauses][37791]
1710 * [There is now a limit on the size of monomorphized types and it can be
1711 modified with the `#![type_size_limit]` crate attribute, similarly to
1712 the `#![recursion_limit]` attribute][37789]
1717 * [On Windows, the compiler will apply dllimport attributes when linking to
1718 extern functions][37973]. Additional attributes and flags can control which
1719 library kind is linked and its name. [RFC 1717].
1720 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1721 * [The `--test` flag works with procedural macro crates][38107]
1722 * [Fix `extern "aapcs" fn` ABI][37814]
1723 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1724 * [The `format!` expander recognizes incorrect `printf` and shell-style
1725 formatting directives and suggests the correct format][37613].
1726 * [Only report one error for all unused imports in an import list][37456]
1728 Compiler Performance
1729 --------------------
1731 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1732 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1733 * [Don't clone in `UnificationTable::probe`][37848]
1734 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1735 * [Use small vectors in type walker][37760]
1736 * [Macro expansion performance was improved][37701]
1737 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1738 * [Replace FNV with a faster hash function][37229]
1743 * [`std::iter::Iterator::min_by`]
1744 * [`std::iter::Iterator::max_by`]
1745 * [`std::os::*::fs::FileExt`]
1746 * [`std::sync::atomic::Atomic*::get_mut`]
1747 * [`std::sync::atomic::Atomic*::into_inner`]
1748 * [`std::vec::IntoIter::as_slice`]
1749 * [`std::vec::IntoIter::as_mut_slice`]
1750 * [`std::sync::mpsc::Receiver::try_iter`]
1751 * [`std::os::unix::process::CommandExt::before_exec`]
1752 * [`std::rc::Rc::strong_count`]
1753 * [`std::rc::Rc::weak_count`]
1754 * [`std::sync::Arc::strong_count`]
1755 * [`std::sync::Arc::weak_count`]
1756 * [`std::char::encode_utf8`]
1757 * [`std::char::encode_utf16`]
1758 * [`std::cell::Ref::clone`]
1759 * [`std::io::Take::into_inner`]
1764 * [The standard sorting algorithm has been rewritten for dramatic performance
1765 improvements][38192]. It is a hybrid merge sort, drawing influences from
1766 Timsort. Previously it was a naive merge sort.
1767 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1768 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1770 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1771 and `char_indices().last()`][37882]
1772 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1773 * [Chinese characters display correctly in `fmt::Debug`][37855]
1774 * [Derive `Default` for `Duration`][37699]
1775 * [Support creation of anonymous pipes on WinXP/2k][37677]
1776 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1777 * [Don't pass overlapped handles to processes][38835]
1782 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1783 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1784 should instead check the variable at runtime with `std::env`. That the value
1785 was set at build time was a bug, and incorrect when cross-compiling. This
1786 change is known to cause breakage.
1787 * [Add `--all` flag to `cargo test`][cargo/3221]
1788 * [Compile statically against the MSVC CRT][cargo/3363]
1789 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1790 * [Link OpenSSL statically on OSX][cargo/3311]
1791 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1792 * [Test for bad path overrides with summaries][cargo/3336]
1793 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1794 * [Fix retrying crate downloads for network errors][cargo/3348]
1795 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1796 * [Emit more info on --message-format=json][cargo/3319]
1797 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1798 * [Don't ignore errors in workspace manifest][cargo/3409]
1799 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1804 * [Test runners (binaries built with `--test`) now support a `--list` argument
1805 that lists the tests it contains][38185]
1806 * [Test runners now support a `--exact` argument that makes the test filter
1807 match exactly, instead of matching only a substring of the test name][38181]
1808 * [rustdoc supports a `--playground-url` flag][37763]
1809 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1814 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1815 continue to be used in this release by passing `--disable-rustbuild` to the
1816 configure script, but they will be deleted soon. Note that the new build
1817 system uses a different on-disk layout that will likely affect any scripts
1819 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
1821 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
1822 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
1828 * [A number of minor changes to name resolution have been activated][37127].
1829 They add up to more consistent semantics, allowing for future evolution of
1830 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1831 details of what is different. The breaking changes here have been transitioned
1832 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1833 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1834 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1835 should instead check the variable at runtime with `std::env`. That the value
1836 was set at build time was a bug, and incorrect when cross-compiling. This
1837 change is known to cause breakage.
1838 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
1839 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
1840 1.10 and is now an error by default. It will become a hard error in the near
1842 * [The semantics relating modules to file system directories are changing in
1843 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
1844 lint, which is a warning in this release, and will become a hard error in the
1846 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1847 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
1848 the underlying iterator][37834]
1850 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
1851 [33685]: https://github.com/rust-lang/rust/issues/33685
1852 [36868]: https://github.com/rust-lang/rust/pull/36868
1853 [37127]: https://github.com/rust-lang/rust/pull/37127
1854 [37229]: https://github.com/rust-lang/rust/pull/37229
1855 [37456]: https://github.com/rust-lang/rust/pull/37456
1856 [37527]: https://github.com/rust-lang/rust/pull/37527
1857 [37602]: https://github.com/rust-lang/rust/pull/37602
1858 [37613]: https://github.com/rust-lang/rust/pull/37613
1859 [37615]: https://github.com/rust-lang/rust/pull/37615
1860 [37636]: https://github.com/rust-lang/rust/pull/37636
1861 [37627]: https://github.com/rust-lang/rust/pull/37627
1862 [37642]: https://github.com/rust-lang/rust/pull/37642
1863 [37677]: https://github.com/rust-lang/rust/pull/37677
1864 [37699]: https://github.com/rust-lang/rust/pull/37699
1865 [37701]: https://github.com/rust-lang/rust/pull/37701
1866 [37705]: https://github.com/rust-lang/rust/pull/37705
1867 [37749]: https://github.com/rust-lang/rust/pull/37749
1868 [37760]: https://github.com/rust-lang/rust/pull/37760
1869 [37763]: https://github.com/rust-lang/rust/pull/37763
1870 [37764]: https://github.com/rust-lang/rust/pull/37764
1871 [37789]: https://github.com/rust-lang/rust/pull/37789
1872 [37791]: https://github.com/rust-lang/rust/pull/37791
1873 [37814]: https://github.com/rust-lang/rust/pull/37814
1874 [37817]: https://github.com/rust-lang/rust/pull/37817
1875 [37834]: https://github.com/rust-lang/rust/pull/37834
1876 [37848]: https://github.com/rust-lang/rust/pull/37848
1877 [37855]: https://github.com/rust-lang/rust/pull/37855
1878 [37882]: https://github.com/rust-lang/rust/pull/37882
1879 [37888]: https://github.com/rust-lang/rust/pull/37888
1880 [37973]: https://github.com/rust-lang/rust/pull/37973
1881 [37979]: https://github.com/rust-lang/rust/pull/37979
1882 [38086]: https://github.com/rust-lang/rust/pull/38086
1883 [38107]: https://github.com/rust-lang/rust/pull/38107
1884 [38117]: https://github.com/rust-lang/rust/pull/38117
1885 [38134]: https://github.com/rust-lang/rust/pull/38134
1886 [38146]: https://github.com/rust-lang/rust/pull/38146
1887 [38181]: https://github.com/rust-lang/rust/pull/38181
1888 [38182]: https://github.com/rust-lang/rust/pull/38182
1889 [38185]: https://github.com/rust-lang/rust/pull/38185
1890 [38192]: https://github.com/rust-lang/rust/pull/38192
1891 [38279]: https://github.com/rust-lang/rust/pull/38279
1892 [38835]: https://github.com/rust-lang/rust/pull/38835
1893 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1894 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1895 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
1896 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
1897 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
1898 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
1899 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
1900 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
1901 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
1902 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
1903 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
1904 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
1905 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
1906 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
1907 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
1908 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
1909 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
1910 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
1911 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
1912 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
1913 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
1914 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
1915 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
1916 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
1917 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
1918 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
1919 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
1920 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
1921 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
1922 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
1923 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
1924 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
1925 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
1926 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
1927 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
1928 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
1929 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
1930 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
1933 Version 1.14.0 (2016-12-22)
1934 ===========================
1939 * [`..` matches multiple tuple fields in enum variants, structs
1940 and tuples][36843]. [RFC 1492].
1941 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
1942 * [`use *` and `use ::*` both glob-import from the crate root][37367]
1943 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
1944 dereferencing][36822]
1949 * [Mark enums with non-zero discriminant as non-zero][37224]
1950 * [Lower-case `static mut` names are linted like other
1951 statics and consts][37162]
1952 * [Fix ICE on some macros in const integer positions
1953 (e.g. `[u8; m!()]`)][36819]
1954 * [Improve error message and snippet for "did you mean `x`"][36798]
1955 * [Add a panic-strategy field to the target specification][36794]
1956 * [Include LLVM version in `--version --verbose`][37200]
1958 Compile-time Optimizations
1959 --------------------------
1961 * [Improve macro expansion performance][37569]
1962 * [Shrink `Expr_::ExprInlineAsm`][37445]
1963 * [Replace all uses of SHA-256 with BLAKE2b][37439]
1964 * [Reduce the number of bytes hashed by `IchHasher`][37427]
1965 * [Avoid more allocations when compiling html5ever][37373]
1966 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
1967 * [Avoid some allocations in the macro parser][37318]
1968 * [Use a faster deflate setting][37298]
1969 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
1970 during interning of slices][37270]
1971 * [Optimize `write_metadata`][37267]
1972 * [Don't process obligation forest cycles when stalled][37231]
1973 * [Avoid many `CrateConfig` clones][37161]
1974 * [Optimize `Substs::super_fold_with`][37108]
1975 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
1976 * [Speed up `plug_leaks`][36917]
1981 * [`println!()`, with no arguments, prints newline][36825].
1982 Previously, an empty string was required to achieve the same.
1983 * [`Wrapping` impls standard binary and unary operators, as well as
1984 the `Sum` and `Product` iterators][37356]
1985 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
1987 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
1988 `VecDeque` iterators][37315]
1989 * [Improve `SipHasher` performance on small values][37312]
1990 * [Add Iterator trait TrustedLen to enable better FromIterator /
1992 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
1993 * [`ReadDir` implements `Debug`][37221]
1994 * [Implement `RefUnwindSafe` for atomic types][37178]
1995 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
1996 * [Avoid allocations in `Decoder::read_str`][37064]
1997 * [`io::Error` implements `From<io::ErrorKind>`][37037]
1998 * [Impl `Debug` for raw pointers to unsized data][36880]
1999 * [Don't reuse `HashMap` random seeds][37470]
2000 * [The internal memory layout of `HashMap` is more cache-friendly, for
2001 significant improvements in some operations][36692]
2002 * [`HashMap` uses less memory on 32-bit architectures][36595]
2003 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2008 * [Expose rustc cfg values to build scripts][cargo/3243]
2009 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2010 * [Fix passing --features when testing multiple packages][cargo/3280]
2011 * [Use a single profile set per workspace][cargo/3249]
2012 * [Load `replace` sections from lock files][cargo/3220]
2013 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2018 * [rustup is the recommended Rust installation method][1.14rustup]
2019 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2020 S390x. These are [tier 2] platforms and may have major defects. Follow the
2021 instructions on the website to install, or add the targets to an existing
2022 installation with `rustup target add`. The new target triples are:
2023 - `mips-unknown-linux-gnu`
2024 - `mipsel-unknown-linux-gnu`
2025 - `mips64-unknown-linux-gnuabi64`
2026 - `mips64el-unknown-linux-gnuabi64 `
2027 - `powerpc-unknown-linux-gnu`
2028 - `powerpc64-unknown-linux-gnu`
2029 - `powerpc64le-unknown-linux-gnu`
2030 - `s390x-unknown-linux-gnu `
2031 * This release includes target (std) builds for ARM Linux running MUSL
2032 libc. These are [tier 2] platforms and may have major defects. Add the
2033 following triples to an existing rustup installation with `rustup target add`:
2034 - `arm-unknown-linux-musleabi`
2035 - `arm-unknown-linux-musleabihf`
2036 - `armv7-unknown-linux-musleabihf`
2037 * This release includes [experimental support for WebAssembly][1.14wasm], via
2038 the `wasm32-unknown-emscripten` target. This target is known to have major
2039 defects. Please test, report, and fix.
2040 * rustup no longer installs documentation by default. Run `rustup
2041 component add rust-docs` to install.
2042 * [Fix line stepping in debugger][37310]
2043 * [Enable line number debuginfo in releases][37280]
2048 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2049 * [Add support for Fuchsia OS][37313]
2050 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2055 * [A number of forward-compatibility lints used by the compiler
2056 to gradually introduce language changes have been converted
2057 to deny by default][36894]:
2058 - ["use of inaccessible extern crate erroneously allowed"][36886]
2059 - ["type parameter default erroneously allowed in invalid location"][36887]
2060 - ["detects super or self keywords at the beginning of global path"][36888]
2061 - ["two overlapping inherent impls define an item with the same name
2062 were erroneously allowed"][36889]
2063 - ["floating-point constants cannot be used in patterns"][36890]
2064 - ["constants of struct or enum type can only be used in a pattern if
2065 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2066 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2067 * [Prohibit patterns in trait methods without bodies][37378]
2068 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2069 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2070 * [The `$crate` macro variable is accepted in fewer locations][37213]
2071 * [Impls specifying extra region requirements beyond the trait
2072 they implement are rejected][37167]
2073 * [Enums may not be unsized][37111]. Unsized enums are intended to
2074 work but never have. For now they are forbidden.
2075 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2077 [tier 2]: https://forge.rust-lang.org/platform-support.html
2078 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2079 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2080 [36430]: https://github.com/rust-lang/rust/pull/36430
2081 [36595]: https://github.com/rust-lang/rust/pull/36595
2082 [36595]: https://github.com/rust-lang/rust/pull/36595
2083 [36692]: https://github.com/rust-lang/rust/pull/36692
2084 [36767]: https://github.com/rust-lang/rust/pull/36767
2085 [36794]: https://github.com/rust-lang/rust/pull/36794
2086 [36798]: https://github.com/rust-lang/rust/pull/36798
2087 [36819]: https://github.com/rust-lang/rust/pull/36819
2088 [36822]: https://github.com/rust-lang/rust/pull/36822
2089 [36825]: https://github.com/rust-lang/rust/pull/36825
2090 [36843]: https://github.com/rust-lang/rust/pull/36843
2091 [36880]: https://github.com/rust-lang/rust/pull/36880
2092 [36886]: https://github.com/rust-lang/rust/issues/36886
2093 [36887]: https://github.com/rust-lang/rust/issues/36887
2094 [36888]: https://github.com/rust-lang/rust/issues/36888
2095 [36889]: https://github.com/rust-lang/rust/issues/36889
2096 [36890]: https://github.com/rust-lang/rust/issues/36890
2097 [36891]: https://github.com/rust-lang/rust/issues/36891
2098 [36892]: https://github.com/rust-lang/rust/issues/36892
2099 [36894]: https://github.com/rust-lang/rust/pull/36894
2100 [36917]: https://github.com/rust-lang/rust/pull/36917
2101 [36993]: https://github.com/rust-lang/rust/pull/36993
2102 [37037]: https://github.com/rust-lang/rust/pull/37037
2103 [37064]: https://github.com/rust-lang/rust/pull/37064
2104 [37094]: https://github.com/rust-lang/rust/pull/37094
2105 [37108]: https://github.com/rust-lang/rust/pull/37108
2106 [37111]: https://github.com/rust-lang/rust/pull/37111
2107 [37161]: https://github.com/rust-lang/rust/pull/37161
2108 [37162]: https://github.com/rust-lang/rust/pull/37162
2109 [37167]: https://github.com/rust-lang/rust/pull/37167
2110 [37178]: https://github.com/rust-lang/rust/pull/37178
2111 [37200]: https://github.com/rust-lang/rust/pull/37200
2112 [37213]: https://github.com/rust-lang/rust/pull/37213
2113 [37221]: https://github.com/rust-lang/rust/pull/37221
2114 [37224]: https://github.com/rust-lang/rust/pull/37224
2115 [37230]: https://github.com/rust-lang/rust/pull/37230
2116 [37231]: https://github.com/rust-lang/rust/pull/37231
2117 [37247]: https://github.com/rust-lang/rust/pull/37247
2118 [37267]: https://github.com/rust-lang/rust/pull/37267
2119 [37270]: https://github.com/rust-lang/rust/pull/37270
2120 [37273]: https://github.com/rust-lang/rust/pull/37273
2121 [37280]: https://github.com/rust-lang/rust/pull/37280
2122 [37298]: https://github.com/rust-lang/rust/pull/37298
2123 [37306]: https://github.com/rust-lang/rust/pull/37306
2124 [37310]: https://github.com/rust-lang/rust/pull/37310
2125 [37312]: https://github.com/rust-lang/rust/pull/37312
2126 [37313]: https://github.com/rust-lang/rust/pull/37313
2127 [37315]: https://github.com/rust-lang/rust/pull/37315
2128 [37318]: https://github.com/rust-lang/rust/pull/37318
2129 [37322]: https://github.com/rust-lang/rust/pull/37322
2130 [37326]: https://github.com/rust-lang/rust/pull/37326
2131 [37351]: https://github.com/rust-lang/rust/pull/37351
2132 [37356]: https://github.com/rust-lang/rust/pull/37356
2133 [37367]: https://github.com/rust-lang/rust/pull/37367
2134 [37373]: https://github.com/rust-lang/rust/pull/37373
2135 [37378]: https://github.com/rust-lang/rust/pull/37378
2136 [37389]: https://github.com/rust-lang/rust/pull/37389
2137 [37392]: https://github.com/rust-lang/rust/pull/37392
2138 [37427]: https://github.com/rust-lang/rust/pull/37427
2139 [37439]: https://github.com/rust-lang/rust/pull/37439
2140 [37445]: https://github.com/rust-lang/rust/pull/37445
2141 [37470]: https://github.com/rust-lang/rust/pull/37470
2142 [37569]: https://github.com/rust-lang/rust/pull/37569
2143 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2144 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2145 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2146 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2147 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2148 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2149 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2152 Version 1.13.0 (2016-11-10)
2153 ===========================
2158 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2159 errors, like the `try!` macro, described in [RFC 0243].
2160 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2161 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2162 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2163 * [Fix lifetime rules for 'if' conditions][36029]
2164 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2169 * [Add the `-C link-arg` argument][36574]
2170 * [Remove the old AST-based backend from rustc_trans][35764]
2171 * [Don't enable NEON by default on armv7 Linux][35814]
2172 * [Fix debug line number info for macro expansions][35238]
2173 * [Do not emit "class method" debuginfo for types that are not
2174 DICompositeType][36008]
2175 * [Warn about multiple conflicting #[repr] hints][34623]
2176 * [When sizing DST, don't double-count nested struct prefixes][36351]
2177 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2178 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2179 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2180 * [Expand macros without recursing to avoid stack overflows][36214]
2185 * [Replace macro backtraces with labeled local uses][35702]
2186 * [Improve error message for misplaced doc comments][33922]
2187 * [Buffer unix and lock windows to prevent message interleaving][35975]
2188 * [Update lifetime errors to specifically note temporaries][36171]
2189 * [Special case a few colors for Windows][36178]
2190 * [Suggest `use self` when such an import resolves][36289]
2191 * [Be more specific when type parameter shadows primitive type][36338]
2192 * Many minor improvements
2194 Compile-time Optimizations
2195 --------------------------
2197 * [Compute and cache HIR hashes at beginning][35854]
2198 * [Don't hash types in loan paths][36004]
2199 * [Cache projections in trans][35761]
2200 * [Optimize the parser's last token handling][36527]
2201 * [Only instantiate #[inline] functions in codegen units referencing
2202 them][36524]. This leads to big improvements in cases where crates export
2203 define many inline functions without using them directly.
2204 * [Lazily allocate TypedArena's first chunk][36592]
2205 * [Don't allocate during default HashSet creation][36734]
2212 * [`overflowing_abs`]
2213 * [`RefCell::try_borrow`]
2214 * [`RefCell::try_borrow_mut`]
2219 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2220 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2222 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2223 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2224 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2225 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2226 * [Use arc4rand on FreeBSD][35884]
2227 * [memrchr: Correct aligned offset computation][35969]
2228 * [Improve Demangling of Rust Symbols][36059]
2229 * [Use monotonic time in condition variables][35048]
2230 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2231 * [Implement conversion traits for `char`][35755]
2232 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2233 * [Zero first byte of CString on drop][36264]
2234 * [Inherit overflow checks for sum and product][36372]
2235 * [Add missing Eq implementations][36423]
2236 * [Implement `Debug` for `DirEntry`][36631]
2237 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2239 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2240 * [Implement more traits for `std::io::ErrorKind`][35911]
2241 * [Optimize BinaryHeap bounds checking][36072]
2242 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2243 `extend_with_element`][36355]
2244 * [Fix overflow checking in unsigned pow()][34942]
2249 * This release includes security fixes to both curl and OpenSSL.
2250 * [Fix transitive doctests when panic=abort][cargo/3021]
2251 * [Add --all-features flag to cargo][cargo/3038]
2252 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2253 * [Don't parse the home directory more than once][cargo/3078]
2254 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2255 * [Update OpenSSL to 1.0.2j][cargo/3121]
2256 * [Add license and license_file to cargo metadata output][cargo/3110]
2257 * [Make crates-io registry URL optional in config; ignore all changes to
2258 source.crates-io][cargo/3089]
2259 * [Don't download dependencies from other platforms][cargo/3123]
2260 * [Build transitive dev-dependencies when needed][cargo/3125]
2261 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2262 * [Avoid updating registry when adding existing deps][cargo/3144]
2263 * [Warn about path overrides that won't work][cargo/3136]
2264 * [Use workspaces during `cargo install`][cargo/3146]
2265 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2266 * [Add --message-format flag][cargo/3000]
2267 * [Pass target environment for rustdoc][cargo/3205]
2268 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2269 * [Update curl and curl-sys][cargo/3241]
2270 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2275 * [rustdoc: Add the `--sysroot` argument][36586]
2276 * [rustdoc: Fix a couple of issues with the search results][35655]
2277 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2278 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2279 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2284 * [Remove unmaintained style guide][35124]
2285 * [Add s390x support][36369]
2286 * [Initial work at Haiku OS support][36727]
2287 * [Add mips-uclibc targets][35734]
2288 * [Crate-ify compiler-rt into compiler-builtins][35021]
2289 * [Add rustc version info (git hash + date) to dist tarball][36213]
2290 * Many documentation improvements
2295 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2296 * [Deny (by default) transmuting from fn item types to pointer-sized
2297 types][34923]. Continuing the long transition to zero-sized fn items,
2299 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2301 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2302 * [Fix lifetime rules for 'if' conditions][36029].
2303 * [Inherit overflow checks for sum and product][36372].
2304 * [Forbid user-defined macros named "macro_rules"][36730].
2306 [33922]: https://github.com/rust-lang/rust/pull/33922
2307 [34623]: https://github.com/rust-lang/rust/pull/34623
2308 [34923]: https://github.com/rust-lang/rust/pull/34923
2309 [34942]: https://github.com/rust-lang/rust/pull/34942
2310 [34982]: https://github.com/rust-lang/rust/pull/34982
2311 [35021]: https://github.com/rust-lang/rust/pull/35021
2312 [35048]: https://github.com/rust-lang/rust/pull/35048
2313 [35074]: https://github.com/rust-lang/rust/pull/35074
2314 [35124]: https://github.com/rust-lang/rust/pull/35124
2315 [35234]: https://github.com/rust-lang/rust/pull/35234
2316 [35238]: https://github.com/rust-lang/rust/pull/35238
2317 [35354]: https://github.com/rust-lang/rust/pull/35354
2318 [35559]: https://github.com/rust-lang/rust/pull/35559
2319 [35585]: https://github.com/rust-lang/rust/pull/35585
2320 [35627]: https://github.com/rust-lang/rust/pull/35627
2321 [35655]: https://github.com/rust-lang/rust/pull/35655
2322 [35702]: https://github.com/rust-lang/rust/pull/35702
2323 [35707]: https://github.com/rust-lang/rust/pull/35707
2324 [35728]: https://github.com/rust-lang/rust/pull/35728
2325 [35734]: https://github.com/rust-lang/rust/pull/35734
2326 [35755]: https://github.com/rust-lang/rust/pull/35755
2327 [35761]: https://github.com/rust-lang/rust/pull/35761
2328 [35764]: https://github.com/rust-lang/rust/pull/35764
2329 [35814]: https://github.com/rust-lang/rust/pull/35814
2330 [35854]: https://github.com/rust-lang/rust/pull/35854
2331 [35871]: https://github.com/rust-lang/rust/pull/35871
2332 [35884]: https://github.com/rust-lang/rust/pull/35884
2333 [35911]: https://github.com/rust-lang/rust/pull/35911
2334 [35969]: https://github.com/rust-lang/rust/pull/35969
2335 [35975]: https://github.com/rust-lang/rust/pull/35975
2336 [36004]: https://github.com/rust-lang/rust/pull/36004
2337 [36008]: https://github.com/rust-lang/rust/pull/36008
2338 [36014]: https://github.com/rust-lang/rust/pull/36014
2339 [36029]: https://github.com/rust-lang/rust/pull/36029
2340 [36059]: https://github.com/rust-lang/rust/pull/36059
2341 [36072]: https://github.com/rust-lang/rust/pull/36072
2342 [36101]: https://github.com/rust-lang/rust/pull/36101
2343 [36104]: https://github.com/rust-lang/rust/pull/36104
2344 [36171]: https://github.com/rust-lang/rust/pull/36171
2345 [36173]: https://github.com/rust-lang/rust/pull/36173
2346 [36178]: https://github.com/rust-lang/rust/pull/36178
2347 [36213]: https://github.com/rust-lang/rust/pull/36213
2348 [36214]: https://github.com/rust-lang/rust/pull/36214
2349 [36264]: https://github.com/rust-lang/rust/pull/36264
2350 [36266]: https://github.com/rust-lang/rust/pull/36266
2351 [36289]: https://github.com/rust-lang/rust/pull/36289
2352 [36338]: https://github.com/rust-lang/rust/pull/36338
2353 [36351]: https://github.com/rust-lang/rust/pull/36351
2354 [36355]: https://github.com/rust-lang/rust/pull/36355
2355 [36369]: https://github.com/rust-lang/rust/pull/36369
2356 [36372]: https://github.com/rust-lang/rust/pull/36372
2357 [36423]: https://github.com/rust-lang/rust/pull/36423
2358 [36482]: https://github.com/rust-lang/rust/pull/36482
2359 [36505]: https://github.com/rust-lang/rust/pull/36505
2360 [36524]: https://github.com/rust-lang/rust/pull/36524
2361 [36527]: https://github.com/rust-lang/rust/pull/36527
2362 [36551]: https://github.com/rust-lang/rust/pull/36551
2363 [36574]: https://github.com/rust-lang/rust/pull/36574
2364 [36586]: https://github.com/rust-lang/rust/pull/36586
2365 [36592]: https://github.com/rust-lang/rust/pull/36592
2366 [36631]: https://github.com/rust-lang/rust/pull/36631
2367 [36639]: https://github.com/rust-lang/rust/pull/36639
2368 [36721]: https://github.com/rust-lang/rust/pull/36721
2369 [36727]: https://github.com/rust-lang/rust/pull/36727
2370 [36730]: https://github.com/rust-lang/rust/pull/36730
2371 [36734]: https://github.com/rust-lang/rust/pull/36734
2372 [36754]: https://github.com/rust-lang/rust/pull/36754
2373 [36995]: https://github.com/rust-lang/rust/pull/36995
2374 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2375 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2376 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2377 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2378 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2379 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2380 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2381 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2382 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2383 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2384 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2385 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2386 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2387 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2388 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2389 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2390 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2391 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2392 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2393 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2394 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2395 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2396 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2397 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2398 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2399 [rustup]: https://www.rustup.rs
2400 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2401 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2402 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2403 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2404 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2405 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2406 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2409 Version 1.12.1 (2016-10-20)
2410 ===========================
2415 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2416 * [Confusion with double negation and booleans][36856]
2417 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2418 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2419 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2420 * [Corrupted memory after updated to 1.12][36936]
2421 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2422 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2423 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2425 [36381]: https://github.com/rust-lang/rust/issues/36381
2426 [36856]: https://github.com/rust-lang/rust/issues/36856
2427 [36875]: https://github.com/rust-lang/rust/issues/36875
2428 [36924]: https://github.com/rust-lang/rust/issues/36924
2429 [36926]: https://github.com/rust-lang/rust/issues/36926
2430 [36936]: https://github.com/rust-lang/rust/issues/36936
2431 [37026]: https://github.com/rust-lang/rust/issues/37026
2432 [37112]: https://github.com/rust-lang/rust/issues/37112
2433 [37153]: https://github.com/rust-lang/rust/issues/37153
2436 Version 1.12.0 (2016-09-29)
2437 ===========================
2442 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2443 This translation pass is far simpler than the previous AST->LLVM pass, and
2444 creates opportunities to perform new optimizations directly on the MIR. It
2445 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2446 * [`rustc` presents a new, more readable error format, along with
2447 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2448 Most common editors supporting Rust have been updated to work with it. It was
2449 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2454 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2455 This translation pass is far simpler than the previous AST->LLVM pass, and
2456 creates opportunities to perform new optimizations directly on the MIR. It
2457 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2458 * [Print the Rust target name, not the LLVM target name, with
2459 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2460 * [The computation of `TypeId` is correct in some cases where it was previously
2461 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2462 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2463 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2464 `--print relocation-models`, and `--print code-models` print the available
2465 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2466 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2467 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2468 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2469 These targets produce statically-linked binaries. There are no binary release
2475 * [`rustc` presents a new, more readable error format, along with
2476 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2477 Most common editors supporting Rust have been updated to work with it. It was
2478 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2479 * [In error descriptions, references are now described in plain English,
2480 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2481 * [In error type descriptions, unknown numeric types are named `{integer}` or
2482 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2483 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2488 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2489 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2490 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2491 useful](https://github.com/rust-lang/rust/pull/34908)
2492 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2493 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2494 * [Semicolons are properly required as statement delimiters inside
2495 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2496 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2501 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2502 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2503 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2504 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2505 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2506 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2507 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2508 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2509 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2510 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2511 Both on Unix and Windows.
2512 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2513 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2514 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2515 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2516 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2517 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2518 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2519 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2524 * [The `format!` macro and friends now allow a single argument to be formatted
2525 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2526 * [The lifetime bounds on `[T]::binary_search_by` and
2527 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2528 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2529 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2530 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2531 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2532 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2533 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2534 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2535 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2536 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2537 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2538 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2539 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2540 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2541 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2542 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2543 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2544 * [`mpsc::sync_channel` `Receiver`s return any available message before
2545 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2546 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2547 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2552 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2553 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2554 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2555 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2556 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2557 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2558 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2559 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2560 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2561 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2562 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2563 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2564 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2565 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2566 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2567 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2572 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2573 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2578 * [Test binaries now support a `--test-threads` argument to specify the number
2579 of threads used to run tests, and which acts the same as the
2580 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2581 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2582 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2583 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2584 * [Rust releases now come with source packages that can be installed by rustup
2585 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2586 The resulting source code can be used by tools and IDES, located in the
2587 sysroot under `lib/rustlib/src`.
2592 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2593 * Many minor improvements to the documentation.
2594 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2599 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2600 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2601 * [When formatting strings, if "precision" is specified, the "fill",
2602 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2603 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2606 Version 1.11.0 (2016-08-18)
2607 ===========================
2612 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2613 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2614 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2615 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2616 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
2621 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
2622 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
2623 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
2624 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
2625 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
2626 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
2627 (in libcore - previously stabilized in libstd)
2628 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
2629 (in libcore - previously stabilized in libstd)
2630 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
2631 (in libcore - previously stabilized in libstd)
2632 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
2633 (in libcore - previously stabilized in libstd)
2634 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2635 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2636 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
2637 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
2642 * [The `thread_local!` macro supports multiple definitions in a single
2643 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
2644 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
2645 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
2646 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
2647 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
2648 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
2649 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
2650 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
2655 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
2656 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
2657 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
2658 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
2659 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
2660 and `-vv` prints warnings for all crates.
2661 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
2662 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
2663 This provides room for expansion by arbitrary tools.
2664 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
2665 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
2666 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
2667 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
2668 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
2669 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
2670 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
2675 * [Caching projections speeds up type check dramatically for some
2676 workloads](https://github.com/rust-lang/rust/pull/33816)
2677 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
2678 This hasher is faster, but is believed to provide sufficient
2679 protection from collision attacks.
2680 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
2685 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
2686 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
2687 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
2688 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
2689 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
2694 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
2695 * [When emitting debug info, rustc emits frame pointers for closures,
2696 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
2697 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2698 * Many more errors have been given error codes and extended
2700 * API documentation continues to be improved, with many new examples
2705 * [rustc no longer hangs when dependencies recursively re-export
2706 submodules](https://github.com/rust-lang/rust/pull/34542)
2707 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
2708 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
2709 rewritten](https://github.com/rust-lang/rust/pull/33895)
2710 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
2711 No targets use this yet, but it works toward AVR support.
2716 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2717 * [The new follow-set rules that place restrictions on `macro_rules!`
2718 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2719 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2720 and has been a warning since 1.10.
2721 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2722 This causes breakage in some corner cases.
2725 Version 1.10.0 (2016-07-07)
2726 ===========================
2731 * [Allow `concat_idents!` in type positions as well as in expression
2732 positions](https://github.com/rust-lang/rust/pull/33735).
2733 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2734 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2735 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2736 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2737 * [`panic!` can be converted to a runtime abort with the
2738 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2739 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2740 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2741 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2742 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2743 Note that Cargo does not yet directly support cdylibs.
2748 * `os::windows::fs::OpenOptionsExt::access_mode`
2749 * `os::windows::fs::OpenOptionsExt::share_mode`
2750 * `os::windows::fs::OpenOptionsExt::custom_flags`
2751 * `os::windows::fs::OpenOptionsExt::attributes`
2752 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2753 * `os::unix::fs::OpenOptionsExt::custom_flags`
2754 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2755 * `Default for sync::Weak`
2756 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2757 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2758 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2759 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2760 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2761 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2762 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2763 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2764 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2765 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2766 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2767 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2768 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2769 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2770 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2771 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2772 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2773 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2774 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2775 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2776 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2777 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2778 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2779 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2780 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2781 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2782 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2783 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2784 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2785 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2786 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2787 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2788 * Read/Write/RawFd impls for `UnixStream`
2789 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2790 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2791 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2792 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2793 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2794 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2795 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2796 * RawFd impls for `UnixListener`
2797 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2798 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2799 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2800 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2801 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2802 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2803 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2804 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2805 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2806 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2807 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2808 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2809 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2810 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2811 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2812 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2813 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2814 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2815 * RawFd impls for `UnixDatagram`
2816 * `{BTree,Hash}Map::values_mut`
2817 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
2822 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
2823 The semantics of this minor method are subtle and probably not what
2825 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
2826 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
2827 will fall back to `/dev/urandom` temporarily to avoid blocking
2828 during early boot](https://github.com/rust-lang/rust/pull/33086).
2829 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
2830 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
2831 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
2832 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
2833 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
2834 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
2835 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
2839 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
2840 This controls the runtime behavior of the `panic!` macro
2841 and can be either "unwind" (the default), or "abort".
2842 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2843 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
2844 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
2845 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
2846 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
2847 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
2848 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
2849 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
2850 By default they are retried twice, which can be customized with the
2851 `net.retry` value in `.cargo/config`.
2852 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
2853 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
2854 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
2855 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
2856 Makes it possible to install multiple crates in parallel.
2857 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
2858 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
2859 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
2860 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
2861 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
2862 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
2867 * [rustc memory usage was reduced by refactoring the context used for
2868 type checking](https://github.com/rust-lang/rust/pull/33425).
2869 * [Speed up creation of `HashMap`s by caching the random keys used
2870 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
2871 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
2872 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
2873 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
2874 10x faster than the previous lookup tables.
2875 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
2880 * Many incremental improvements to documentation and rustdoc.
2881 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
2882 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
2883 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
2884 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
2885 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
2886 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
2887 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
2892 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
2893 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
2894 * [`std` no longer prints backtraces on platforms where the running
2895 module must be loaded with `env::current_exe`, which can't be relied
2896 on](https://github.com/rust-lang/rust/pull/33554).
2897 * This release includes std binaries for the i586-unknown-linux-gnu,
2898 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
2899 i586 target is for old x86 hardware without SSE2, and the armv7
2900 target is for Android running on modern ARM architectures.
2901 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
2902 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
2903 * [On Unix the runtime aborts by calling `libc::abort` instead of
2904 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
2905 * [Rust is now bootstrapped from the previous release of Rust,
2906 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
2911 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
2912 * [`target_env` for Linux ARM targets is just `gnu`, not
2913 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
2914 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
2915 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
2916 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
2917 Affects how macros are parsed.
2918 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
2919 * [Feature-gated attributes on macro-generated macro invocations are
2920 now rejected](https://github.com/rust-lang/rust/pull/32791).
2921 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
2922 This caused some minor changes to type inference.
2925 Version 1.9.0 (2016-05-26)
2926 ==========================
2931 * The `#[deprecated]` attribute when applied to an API will generate
2932 warnings when used. The warnings may be suppressed with
2933 `#[allow(deprecated)]`. [RFC 1270].
2934 * [`fn` item types are zero sized, and each `fn` names a unique
2935 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2936 `transmute` on a `fn` type will generate a warning for a few cycles,
2937 then will be converted to an error.
2938 * [Field and method resolution understand visibility, so private
2939 fields and methods cannot prevent the proper use of public fields
2940 and methods][1.9fv].
2941 * [The parser considers unicode codepoints in the
2942 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
2948 * [`std::panic::catch_unwind`][] (renamed from `recover`)
2949 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
2950 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
2951 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
2952 * [`str::is_char_boundary`]
2953 * [`<*const T>::as_ref`]
2954 * [`<*mut T>::as_ref`]
2955 * [`<*mut T>::as_mut`]
2956 * [`AsciiExt::make_ascii_uppercase`]
2957 * [`AsciiExt::make_ascii_lowercase`]
2958 * [`char::decode_utf16`]
2959 * [`char::DecodeUtf16`]
2960 * [`char::DecodeUtf16Error`]
2961 * [`char::DecodeUtf16Error::unpaired_surrogate`]
2962 * [`BTreeSet::take`]
2963 * [`BTreeSet::replace`]
2966 * [`HashSet::replace`]
2968 * [`OsString::with_capacity`]
2969 * [`OsString::clear`]
2970 * [`OsString::capacity`]
2971 * [`OsString::reserve`]
2972 * [`OsString::reserve_exact`]
2973 * [`OsStr::is_empty`]
2975 * [`std::os::unix::thread`]
2978 * [`JoinHandleExt::as_pthread_t`]
2979 * [`JoinHandleExt::into_pthread_t`]
2980 * [`HashSet::hasher`]
2981 * [`HashMap::hasher`]
2982 * [`CommandExt::exec`]
2983 * [`File::try_clone`]
2984 * [`SocketAddr::set_ip`]
2985 * [`SocketAddr::set_port`]
2986 * [`SocketAddrV4::set_ip`]
2987 * [`SocketAddrV4::set_port`]
2988 * [`SocketAddrV6::set_ip`]
2989 * [`SocketAddrV6::set_port`]
2990 * [`SocketAddrV6::set_flowinfo`]
2991 * [`SocketAddrV6::set_scope_id`]
2992 * [`slice::copy_from_slice`]
2993 * [`ptr::read_volatile`]
2994 * [`ptr::write_volatile`]
2995 * [`OpenOptions::create_new`]
2996 * [`TcpStream::set_nodelay`]
2997 * [`TcpStream::nodelay`]
2998 * [`TcpStream::set_ttl`]
2999 * [`TcpStream::ttl`]
3000 * [`TcpStream::set_only_v6`]
3001 * [`TcpStream::only_v6`]
3002 * [`TcpStream::take_error`]
3003 * [`TcpStream::set_nonblocking`]
3004 * [`TcpListener::set_ttl`]
3005 * [`TcpListener::ttl`]
3006 * [`TcpListener::set_only_v6`]
3007 * [`TcpListener::only_v6`]
3008 * [`TcpListener::take_error`]
3009 * [`TcpListener::set_nonblocking`]
3010 * [`UdpSocket::set_broadcast`]
3011 * [`UdpSocket::broadcast`]
3012 * [`UdpSocket::set_multicast_loop_v4`]
3013 * [`UdpSocket::multicast_loop_v4`]
3014 * [`UdpSocket::set_multicast_ttl_v4`]
3015 * [`UdpSocket::multicast_ttl_v4`]
3016 * [`UdpSocket::set_multicast_loop_v6`]
3017 * [`UdpSocket::multicast_loop_v6`]
3018 * [`UdpSocket::set_multicast_ttl_v6`]
3019 * [`UdpSocket::multicast_ttl_v6`]
3020 * [`UdpSocket::set_ttl`]
3021 * [`UdpSocket::ttl`]
3022 * [`UdpSocket::set_only_v6`]
3023 * [`UdpSocket::only_v6`]
3024 * [`UdpSocket::join_multicast_v4`]
3025 * [`UdpSocket::join_multicast_v6`]
3026 * [`UdpSocket::leave_multicast_v4`]
3027 * [`UdpSocket::leave_multicast_v6`]
3028 * [`UdpSocket::take_error`]
3029 * [`UdpSocket::connect`]
3030 * [`UdpSocket::send`]
3031 * [`UdpSocket::recv`]
3032 * [`UdpSocket::set_nonblocking`]
3037 * [`std::sync::Once` is poisoned if its initialization function
3039 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3040 * [Most types implement `fmt::Debug`][1.9db].
3041 * [The default buffer size used by `BufReader` and `BufWriter` was
3042 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3043 used by other languages.
3044 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3045 `Duration` additionally implements `*=` and `/=`][1.9ta].
3046 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3047 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3048 * [`Chain` implements `BufRead`][1.9ch].
3049 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3054 * [Cargo can now run concurrently][1.9cc].
3055 * [Top-level overrides allow specific revisions of crates to be
3056 overridden through the entire crate graph][1.9ct]. This is intended
3057 to make upgrades easier for large projects, by allowing crates to be
3058 forked temporarily until they've been upgraded and republished.
3059 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3060 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3061 on the commandline][1.9cf]. `rustc` arguments can also be specified
3062 in the `build.rustflags` configuration key.
3067 * [The time complexity of comparing variables for equivalence during type
3068 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3069 to major compilation time improvement in some scenarios.
3070 * [`ToString` is specialized for `str`, giving it the same performance
3071 as `to_owned`][1.9ts].
3072 * [Spawning processes with `Command::output` no longer creates extra
3074 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3075 for C-like enums][1.9cl].
3080 * [Passing the `--quiet` flag to a test runner will produce
3081 much-abbreviated output][1.9q].
3082 * The Rust Project now publishes std binaries for the
3083 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3084 `i586-pc-windows-msvc` targets.
3089 * [`std::sync::Once` is poisoned if its initialization function
3091 * [It is illegal to define methods with the same name in overlapping
3092 inherent `impl` blocks][1.9sn].
3093 * [`fn` item types are zero sized, and each `fn` names a unique
3094 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3095 `transmute` on a `fn` type will generate a warning for a few cycles,
3096 then will be converted to an error.
3097 * [Improvements to const evaluation may trigger new errors when integer
3098 literals are out of range][1.9ce].
3101 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3102 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3103 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3104 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3105 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3106 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3107 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3108 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3109 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3110 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3111 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3112 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3113 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3114 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3115 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3116 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3117 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3118 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3119 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3120 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3121 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3122 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3123 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3124 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3125 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3126 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3127 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3128 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3129 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3130 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3131 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3132 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3133 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3134 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3135 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3136 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3137 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3138 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3139 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3140 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3141 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3142 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3143 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3144 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3145 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3146 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3147 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3148 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3149 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3150 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3151 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3152 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3153 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3154 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3155 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3156 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3157 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3158 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3159 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3160 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3161 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3162 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3163 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3164 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3165 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3166 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3167 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3168 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3169 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3170 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3171 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3172 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3173 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3174 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3175 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3176 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3177 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3178 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3179 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3180 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3181 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3182 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3183 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3184 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3185 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3186 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3187 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3188 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3189 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3190 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3191 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3192 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3193 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3194 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3195 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3196 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3197 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3198 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3199 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3200 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3201 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3202 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3203 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3204 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3205 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3206 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3207 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3208 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3209 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3210 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3213 Version 1.8.0 (2016-04-14)
3214 ==========================
3219 * Rust supports overloading of compound assignment statements like
3220 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3221 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3222 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3224 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3225 addition to the non-braced form, `struct Foo;`. [RFC 218].
3231 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3232 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3235 * [`ptr::drop_in_place`]
3237 * [`time::SystemTime`]
3239 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3240 * [`Instant::elapsed`]
3241 * [`SystemTime::now`]
3242 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3243 * [`SystemTime::elapsed`]
3244 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3245 * [`SystemTimeError`]
3246 * [`SystemTimeError::duration`]
3247 * Various impls for `SystemTimeError`
3249 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3250 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3251 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3252 * [The `write!` and `writeln!` macros correctly emit errors if any of
3253 their arguments can't be formatted][1.8w].
3254 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3255 * [The Unix-specific `raw` modules, which contain a number of
3256 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3257 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3258 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3259 across platforms was making it difficult to implement `std`
3260 correctly. Those that need these definitions should use the `libc`
3262 * The Unix-specific `MetadataExt` traits, including
3263 `os::unix::fs::MetadataExt`, which expose values such as inode
3264 numbers [no longer return platform-specific types][1.8r], but
3265 instead return widened integers. [RFC 1415].
3266 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3267 * [Atomic loads and stores are not volatile][1.8a].
3268 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3273 * [Inlining hash functions lead to a 3% compile-time improvement in
3274 some workloads][1.8h].
3275 * When using jemalloc, its symbols are [unprefixed so that it
3276 overrides the libc malloc implementation][1.8h]. This means that for
3277 rustc, LLVM is now using jemalloc, which results in a 6%
3278 compile-time improvement on a specific workload.
3279 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3284 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3285 i686-pc-windows-msvc is now considered a tier-1 platform.
3286 * [The `--print targets` flag prints a list of supported targets][1.8t].
3287 * [The `--print cfg` flag prints the `cfg`s defined for the current
3289 * [`rustc` can be built with an new Cargo-based build system, written
3290 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3291 build system. To enable it configure with `configure --rustbuild`.
3292 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3293 variants while also indicating the total number of missing variants
3294 if more than 3][1.8m].
3295 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3296 * The Rust Project now publishes binary releases of the standard
3297 library for a number of tier-2 targets:
3298 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3299 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3300 `x86_64-rumprun-netbsd`. These can be installed with
3301 tools such as [multirust][1.8mr].
3306 * [`cargo init` creates a new Cargo project in the current
3307 directory][1.8ci]. It is otherwise like `cargo new`.
3308 * [Cargo has configuration keys for `-v` and
3309 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3310 `[term]` section of `.cargo/config`.
3311 * [Configuration keys that evaluate to strings or integers can be set
3312 via environment variables][1.8ce]. For example the `build.jobs` key
3313 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3314 precedence over config files.
3315 * [Target-specific dependencies support Rust `cfg` syntax for
3316 describing targets][1.8cfg] so that dependencies for multiple
3317 targets can be specified together. [RFC 1361].
3318 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3319 `RUSTDOC` take precedence over the `build.target-dir`,
3320 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3321 * [The child process tree is killed on Windows when Cargo is
3323 * [The `build.target` configuration value sets the target platform,
3324 like `--target`][1.8ct].
3329 * [Unstable compiler flags have been further restricted][1.8u]. Since
3330 1.0 `-Z` flags have been considered unstable, and other flags that
3331 were considered unstable additionally required passing `-Z
3332 unstable-options` to access. Unlike unstable language and library
3333 features though, these options have been accessible on the stable
3334 release channel. Going forward, *new unstable flags will not be
3335 available on the stable release channel*, and old unstable flags
3336 will warn about their usage. In the future, all unstable flags will
3337 be unavailable on the stable release channel.
3338 * [It is no longer possible to `match` on empty enum variants using
3339 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3340 * The Unix-specific `MetadataExt` traits, including
3341 `os::unix::fs::MetadataExt`, which expose values such as inode
3342 numbers [no longer return platform-specific types][1.8r], but
3343 instead return widened integers. [RFC 1415].
3344 * [Modules sourced from the filesystem cannot appear within arbitrary
3345 blocks, but only within other modules][1.8mf].
3346 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3347 * On Unix, [stack overflow triggers a runtime abort instead of a
3349 * [`Command::spawn` and its equivalents return an error if any of
3350 its command-line arguments contain interior `NUL`s][1.8n].
3351 * [Tuple and unit enum variants from other crates are in the type
3353 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3354 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3355 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3356 instead of `foo.lib`.
3359 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3360 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3361 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3362 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3363 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3364 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3365 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3366 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3367 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3368 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3369 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3370 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3371 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3372 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3373 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3374 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3375 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3376 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3377 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3378 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3379 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3380 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3381 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3382 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3383 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3384 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3385 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3386 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3387 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3388 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3389 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3390 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3391 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3392 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3393 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3394 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3395 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3396 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3397 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3398 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3399 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3400 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3401 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3402 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3403 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3404 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3405 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3406 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3407 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3408 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3409 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3410 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3411 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3412 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3413 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3414 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3415 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3416 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3417 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3418 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3421 Version 1.7.0 (2016-03-03)
3422 ==========================
3429 * [`Path::strip_prefix`][] (renamed from relative_from)
3430 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3432 * [`Ipv4Addr::is_loopback`]
3433 * [`Ipv4Addr::is_private`]
3434 * [`Ipv4Addr::is_link_local`]
3435 * [`Ipv4Addr::is_multicast`]
3436 * [`Ipv4Addr::is_broadcast`]
3437 * [`Ipv4Addr::is_documentation`]
3439 * [`Ipv6Addr::is_unspecified`]
3440 * [`Ipv6Addr::is_loopback`]
3441 * [`Ipv6Addr::is_multicast`]
3444 * [`Vec::as_mut_slice`]
3446 * [`String::as_str`]
3447 * [`String::as_mut_str`]
3449 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3451 * `<[T]>::`[`sort_by_key`]
3452 * checked, saturated, and overflowing operations
3453 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3454 * [`i32::saturating_mul`]
3455 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3456 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3457 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3458 * [`u32::saturating_mul`]
3459 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3460 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3461 * and checked, saturated, and overflowing operations for other primitive types
3463 * [`ffi::IntoStringError`]
3464 * [`CString::into_string`]
3465 * [`CString::into_bytes`]
3466 * [`CString::into_bytes_with_nul`]
3467 * `From<CString> for Vec<u8>`
3469 * [`IntoStringError::into_cstring`]
3470 * [`IntoStringError::utf8_error`]
3471 * `Error for IntoStringError`
3473 * [`std::hash::BuildHasher`]
3474 * [`BuildHasher::Hasher`]
3475 * [`BuildHasher::build_hasher`]
3476 * [`std::hash::BuildHasherDefault`]
3477 * [`HashMap::with_hasher`]
3478 * [`HashMap::with_capacity_and_hasher`]
3479 * [`HashSet::with_hasher`]
3480 * [`HashSet::with_capacity_and_hasher`]
3481 * [`std::collections::hash_map::RandomState`]
3482 * [`RandomState::new`]
3483 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3484 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3485 from bytes is faster.
3486 * [The performance of `LineWriter` (and thus `io::stdout`) was
3487 improved by using `memchr` to search for newlines][1.7m].
3488 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3489 `f64` variants were stabilized previously.
3490 * [`BTreeMap` was rewritten to use less memory and improve the performance
3491 of insertion and iteration, the latter by as much as 5x][1.7bm].
3492 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3493 covariant over their contained type][1.7bt].
3494 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3495 over their contained type][1.7ll].
3496 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3498 * [`Any` is implemented for unsized types][1.7a].
3499 * [`Hash` is implemented for `Duration`][1.7h].
3504 * [When running tests with `--test`, rustdoc will pass `--cfg`
3505 arguments to the compiler][1.7dt].
3506 * [The compiler is built with RPATH information by default][1.7rpa].
3507 This means that it will be possible to run `rustc` when installed in
3508 unusual configurations without configuring the dynamic linker search
3510 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3511 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3512 over `LD_LIBRARY_PATH`.
3517 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3518 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3519 * [The `rerun-if-changed` build script directive no longer causes the
3520 build script to incorrectly run twice in certain scenarios][1.7rr].
3525 * Soundness fixes to the interactions between associated types and
3526 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3527 code that violates the new rules. This is a significant change that
3528 is known to break existing code, so it has emitted warnings for the
3529 new error cases since 1.4 to give crate authors time to adapt. The
3530 details of what is changing are subtle; read the RFC for more.
3531 * [Several bugs in the compiler's visibility calculations were
3532 fixed][1.7v]. Since this was found to break significant amounts of
3533 code, the new errors will be emitted as warnings for several release
3534 cycles, under the `private_in_public` lint.
3535 * Defaulted type parameters were accidentally accepted in positions
3536 that were not intended. In this release, [defaulted type parameters
3537 appearing outside of type definitions will generate a
3538 warning][1.7d], which will become an error in future releases.
3539 * [Parsing "." as a float results in an error instead of 0][1.7p].
3540 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3541 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3543 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3544 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3545 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3546 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3547 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3548 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3549 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3550 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3551 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3552 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3553 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3554 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3555 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3556 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3557 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3558 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3559 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3560 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3561 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3562 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3563 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3564 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3565 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3566 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3567 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3568 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3569 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3570 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3571 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3572 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3573 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3574 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3575 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3576 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3577 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3578 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3579 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3580 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3581 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3582 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3583 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3584 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3585 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3586 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3587 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3588 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3589 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3590 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3591 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3592 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3593 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3594 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3595 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3596 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3597 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3598 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3599 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3600 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3601 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3602 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3603 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3604 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3605 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3606 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3607 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3608 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3609 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3610 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3611 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3612 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3613 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3614 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3615 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3616 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3617 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3618 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3619 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3620 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
3621 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
3624 Version 1.6.0 (2016-01-21)
3625 ==========================
3630 * The `#![no_std]` attribute causes a crate to not be linked to the
3631 standard library, but only the [core library][1.6co], as described
3632 in [RFC 1184]. The core library defines common types and traits but
3633 has no platform dependencies whatsoever, and is the basis for Rust
3634 software in environments that cannot support a full port of the
3635 standard library, such as operating systems. Most of the core
3636 library is now stable.
3642 [`Read::read_exact`],
3643 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
3644 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
3645 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
3646 [`os::unix::fs::DirBuilderExt`],
3647 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
3648 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
3649 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
3650 [`collections::hash_map::Drain`],
3651 [`collections::hash_map::HashMap::drain`],
3652 [`collections::hash_set::Drain`],
3653 [`collections::hash_set::HashSet::drain`],
3654 [`collections::binary_heap::Drain`],
3655 [`collections::binary_heap::BinaryHeap::drain`],
3656 [`Vec::extend_from_slice`][] (renamed from `push_all`),
3657 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
3658 [`RwLock::into_inner`],
3659 [`Iterator::min_by_key`][] (renamed from `min_by`),
3660 [`Iterator::max_by_key`][] (renamed from `max_by`).
3661 * The [core library][1.6co] is stable, as are most of its APIs.
3662 * [The `assert_eq!` macro supports arguments that don't implement
3663 `Sized`][1.6ae], such as arrays. In this way it behaves more like
3665 * Several timer functions that take duration in milliseconds [are
3666 deprecated in favor of those that take `Duration`][1.6ms]. These
3667 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
3668 `thread::park_timeout_ms`.
3669 * The algorithm by which `Vec` reserves additional elements was
3670 [tweaked to not allocate excessive space][1.6a] while still growing
3672 * `From` conversions are [implemented from integers to floats][1.6f]
3673 in cases where the conversion is lossless. Thus they are not
3674 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
3675 or `f64`. They are also not implemented for `isize` and `usize`
3676 because the implementations would be platform-specific. `From` is
3677 also implemented from `f32` to `f64`.
3678 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
3679 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
3680 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
3681 * [`BinaryHeap` was refactored][1.6bh] for modest performance
3683 * Sorting slices that are already sorted [is 50% faster in some
3689 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
3690 * Cargo build scripts can specify their dependencies by emitting the
3691 [`rerun-if-changed`][1.6rr] key.
3692 * crates.io will reject publication of crates with dependencies that
3693 have a wildcard version constraint. Crates with wildcard
3694 dependencies were seen to cause a variety of problems, as described
3695 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
3697 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
3698 release folder. A variety of artifacts that Cargo failed to clean
3699 are now correctly deleted.
3704 * The `unreachable_code` lint [warns when a function call's argument
3706 * The parser indicates [failures that may be caused by
3707 confusingly-similar Unicode characters][1.6uc]
3708 * Certain macro errors [are reported at definition time][1.6m], not
3714 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3715 environment variable when locating crates. This was a pre-cargo
3716 feature for integrating with the package manager that was
3717 accidentally never removed.
3718 * [A number of bugs were fixed in the privacy checker][1.6p] that
3719 could cause previously-accepted code to break.
3720 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3721 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3722 struct pattern syntax (`Foo(..)`) can no longer be used to match
3723 unit structs. This is a warning now, but will become an error in
3724 future releases. Patterns that share the same name as a const are
3726 * A bug was fixed that causes [rustc not to apply default type
3727 parameters][1.6xc] when resolving certain method implementations of
3728 traits defined in other crates.
3730 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3731 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3732 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3733 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3734 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3735 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3736 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3737 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3738 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3739 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3740 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3741 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3742 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3743 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3744 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3745 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3746 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3747 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3748 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3749 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3750 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3751 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3752 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3753 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3754 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3755 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3756 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3757 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3758 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3759 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3760 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3761 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3762 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3763 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3764 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3765 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3766 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3767 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3768 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3769 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3770 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3771 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3772 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3773 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3774 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3775 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3776 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3779 Version 1.5.0 (2015-12-10)
3780 ==========================
3782 * ~700 changes, numerous bugfixes
3788 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3789 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3790 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3791 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3792 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3793 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3794 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3795 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3796 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3797 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3798 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3799 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3800 [`Path::read_link`], [`Path::symlink_metadata`],
3801 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3802 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3803 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3804 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3805 [`slice::split_first_mut`], [`slice::split_first`],
3806 [`slice::split_last_mut`], [`slice::split_last`],
3807 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3808 [`str::MatchIndices`], [`str::RMatchIndices`],
3809 [`str::match_indices`], [`str::rmatch_indices`],
3810 [`str::slice_mut_unchecked`], [`string::ParseError`].
3811 * Rust applications hosted on crates.io can be installed locally to
3812 `~/.cargo/bin` with the [`cargo install`] command. Among other
3813 things this makes it easier to augment Cargo with new subcommands:
3814 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3815 invoked as `cargo foo`.
3816 * Crates with wildcard (`*`) dependencies will [emit warnings when
3817 published][1.5w]. In 1.6 it will no longer be possible to publish
3818 crates with wildcard dependencies.
3823 * The rules determining when a particular lifetime must outlive
3824 a particular value (known as '[dropck]') have been [modified
3825 to not rely on parametricity][1.5p].
3826 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
3827 and `Arc`][1.5a]. Because these smart pointer types implement
3828 `Deref`, this causes breakage in cases where the interior type
3829 contains methods of the same name.
3830 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
3831 that they could drop their content. Soundness fix.
3832 * All method invocations are [properly checked][1.5wf1] for
3833 [well-formedness][1.5wf2]. Soundness fix.
3834 * Traits whose supertraits contain `Self` are [not object
3835 safe][1.5o]. Soundness fix.
3836 * Target specifications support a [`no_default_libraries`][1.5nd]
3837 setting that controls whether `-nodefaultlibs` is passed to the
3838 linker, and in turn the `is_like_windows` setting no longer affects
3839 the `-nodefaultlibs` flag.
3840 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
3841 * The `#[inline]` and `#[repr]` attributes [can only appear
3842 in valid locations][1.5at].
3843 * Native libraries linked from the local crate are [passed to
3844 the linker before native libraries from upstream crates][1.5nl].
3845 * Two rarely-used attributes, `#[no_debug]` and
3846 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
3847 * Negation of unsigned integers, which has been a warning for
3848 several releases, [is now behind a feature gate and will
3849 generate errors][1.5nu].
3850 * The parser accidentally accepted visibility modifiers on
3851 enum variants, a bug [which has been fixed][1.5ev].
3852 * [A bug was fixed that allowed `use` statements to import unstable
3858 * When evaluating expressions at compile-time that are not
3859 compile-time constants (const-evaluating expressions in non-const
3860 contexts), incorrect code such as overlong bitshifts and arithmetic
3861 overflow will [generate a warning instead of an error][1.5ce],
3862 delaying the error until runtime. This will allow the
3863 const-evaluator to be expanded in the future backwards-compatibly.
3864 * The `improper_ctypes` lint [no longer warns about using `isize` and
3865 `usize` in FFI][1.5ict].
3870 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
3872 * `Default` is [implemented for mutable slices][1.5d].
3873 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
3874 * There are now `From` conversions [between floating point
3875 types][1.5f] where the conversions are lossless.
3876 * There are now `From` conversions [between integer types][1.5i] where
3877 the conversions are lossless.
3878 * [`fs::Metadata` implements `Clone`][1.5fs].
3879 * The `parse` method [accepts a leading "+" when parsing
3881 * [`AsMut` is implemented for `Vec`][1.5am].
3882 * The `clone_from` implementations for `String` and `BinaryHeap` [have
3883 been optimized][1.5cf] and no longer rely on the default impl.
3884 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
3885 `unsafe extern "C"` function types now [implement `Clone`,
3886 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
3887 `fmt::Debug` for up to 12 arguments][1.5fp].
3888 * [Dropping `Vec`s is much faster in unoptimized builds when the
3889 element types don't implement `Drop`][1.5dv].
3890 * A bug that caused in incorrect behavior when [combining `VecDeque`
3891 with zero-sized types][1.5vdz] was resolved.
3892 * [`PartialOrd` for slices is faster][1.5po].
3897 * [Crate metadata size was reduced by 20%][1.5md].
3898 * [Improvements to code generation reduced the size of libcore by 3.3
3899 MB and rustc's memory usage by 18MB][1.5m].
3900 * [Improvements to deref translation increased performance in
3901 unoptimized builds][1.5dr].
3902 * Various errors in trait resolution [are deduplicated to only be
3903 reported once][1.5te].
3904 * Rust has preliminary [support for rumprun kernels][1.5rr].
3905 * Rust has preliminary [support for NetBSD on amd64][1.5na].
3907 [1.5use]: https://github.com/rust-lang/rust/pull/28364
3908 [1.5po]: https://github.com/rust-lang/rust/pull/28436
3909 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
3910 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
3911 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
3912 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
3913 [1.5md]: https://github.com/rust-lang/rust/pull/28521
3914 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
3915 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
3916 [1.5na]: https://github.com/rust-lang/rust/pull/28543
3917 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
3918 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
3919 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
3920 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
3921 [1.5te]: https://github.com/rust-lang/rust/pull/28645
3922 [1.5at]: https://github.com/rust-lang/rust/pull/28650
3923 [1.5am]: https://github.com/rust-lang/rust/pull/28663
3924 [1.5m]: https://github.com/rust-lang/rust/pull/28778
3925 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
3926 [1.5a]: https://github.com/rust-lang/rust/pull/28811
3927 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
3928 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
3929 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
3930 [1.5i]: https://github.com/rust-lang/rust/pull/28921
3931 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
3932 [1.5f]: https://github.com/rust-lang/rust/pull/29129
3933 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
3934 [1.5s]: https://github.com/rust-lang/rust/pull/29190
3935 [1.5d]: https://github.com/rust-lang/rust/pull/29245
3936 [1.5o]: https://github.com/rust-lang/rust/pull/29259
3937 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
3938 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3939 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
3940 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
3941 [1.5c]: https://github.com/rust-lang/rust/pull/29110
3942 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3943 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
3944 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
3945 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
3946 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
3947 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
3948 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
3949 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
3950 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
3951 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
3952 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
3953 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
3954 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
3955 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
3956 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
3957 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
3958 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
3959 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
3960 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
3961 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
3962 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
3963 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
3964 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
3965 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
3966 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
3967 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
3968 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
3969 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
3970 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
3971 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
3972 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
3973 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
3974 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
3975 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
3976 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
3977 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
3978 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
3979 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
3980 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
3981 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
3982 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
3983 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
3984 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
3985 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
3986 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
3987 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
3988 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
3989 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
3990 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
3991 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
3992 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
3993 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
3994 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
3995 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
3997 Version 1.4.0 (2015-10-29)
3998 ==========================
4000 * ~1200 changes, numerous bugfixes
4005 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4006 GNU) are now supported and recommended for use.
4011 * [Several changes have been made to fix type soundness and improve
4012 the behavior of associated types][sound]. See [RFC 1214]. Although
4013 we have mostly introduced these changes as warnings this release, to
4014 become errors next release, there are still some scenarios that will
4015 see immediate breakage.
4016 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4017 line breaks in addition to `\n`][crlf].
4018 * [Loans of `'static` lifetime extend to the end of a function][stat].
4019 * [`str::parse` no longer introduces avoidable rounding error when
4020 parsing floating point numbers. Together with earlier changes to
4021 float formatting/output, "round trips" like f.to_string().parse()
4022 now preserve the value of f exactly. Additionally, leading plus
4023 signs are now accepted][fp3].
4029 * `use` statements that import multiple items [can now rename
4030 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4031 * [Binops work correctly on fat pointers][binfat].
4032 * `pub extern crate`, which does not behave as expected, [issues a
4033 warning][pec] until a better solution is found.
4038 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4039 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4040 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4041 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4042 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4043 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4044 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4045 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4046 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4047 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4048 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4049 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4050 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4051 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4052 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4053 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4054 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4055 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4057 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4058 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4059 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4060 `f64::from_str_radix`.
4061 * [Reverse-searching strings is faster with the 'two-way'
4063 * [`std::io::copy` allows `?Sized` arguments][cc].
4064 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4065 [override `count`, `nth` and `last` with an O(1)
4066 implementation][it].
4067 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4068 * [`IntoRawFd` has been added to the Unix-specific prelude,
4069 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4071 * [`Extend<String>` and `FromIterator<String` are both implemented for
4073 * [`IntoIterator` is implemented for references to `Option` and
4075 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4076 Copy`][ext] as part of [RFC 839]. This will cause type inference
4077 breakage in rare situations.
4078 * [`BinaryHeap` implements `Debug`][bh2].
4079 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4081 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4082 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4083 * [String comparison is faster][faststr].
4084 * `&mut T` where `T: std::fmt::Write` [also implements
4085 `std::fmt::Write`][mutw].
4086 * [A stable regression in `VecDeque::push_back` and other
4087 capacity-altering methods that caused panics for zero-sized types
4089 * [Function pointers implement traits for up to 12 parameters][fp2].
4094 * The compiler [no longer uses the 'morestack' feature to prevent
4095 stack overflow][mm]. Instead it uses guard pages and stack
4096 probes (though stack probes are not yet implemented on any platform
4098 * [The compiler matches traits faster when projections are involved][p].
4099 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4101 * [Cargo now displays useful information about what its doing during
4102 `cargo update`][cu].
4104 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4105 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4106 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4107 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4108 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4109 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4110 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4111 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4112 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4113 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4114 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4115 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4116 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4117 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4118 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4119 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4120 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4121 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4122 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4123 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4124 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4125 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4126 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4127 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4128 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4129 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4130 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4131 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4132 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4133 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4134 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4135 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4136 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4137 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4138 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4139 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4140 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4141 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4142 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4143 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4144 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4145 [bh2]: https://github.com/rust-lang/rust/pull/28156
4146 [binfat]: https://github.com/rust-lang/rust/pull/28270
4147 [bm]: https://github.com/rust-lang/rust/pull/28197
4148 [cc]: https://github.com/rust-lang/rust/pull/27531
4149 [crlf]: https://github.com/rust-lang/rust/pull/28034
4150 [cu]: https://github.com/rust-lang/cargo/pull/1931
4151 [d]: https://github.com/rust-lang/rust/pull/27825
4152 [dep]: https://github.com/rust-lang/rust/pull/28339
4153 [es]: https://github.com/rust-lang/rust/pull/27956
4154 [ext]: https://github.com/rust-lang/rust/pull/28094
4155 [faststr]: https://github.com/rust-lang/rust/pull/28338
4156 [ffi]: https://github.com/rust-lang/rust/pull/28779
4157 [fp]: https://github.com/rust-lang/rust/pull/28268
4158 [fp2]: https://github.com/rust-lang/rust/pull/28560
4159 [fp3]: https://github.com/rust-lang/rust/pull/27307
4160 [i]: https://github.com/rust-lang/rust/pull/27451
4161 [into2]: https://github.com/rust-lang/rust/pull/28039
4162 [it]: https://github.com/rust-lang/rust/pull/27652
4163 [mm]: https://github.com/rust-lang/rust/pull/27338
4164 [mutw]: https://github.com/rust-lang/rust/pull/28368
4165 [sound]: https://github.com/rust-lang/rust/pull/27641
4166 [p]: https://github.com/rust-lang/rust/pull/27866
4167 [pec]: https://github.com/rust-lang/rust/pull/28486
4168 [pr]: https://github.com/rust-lang/rust/pull/27896
4169 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4170 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4171 [s]: https://github.com/rust-lang/rust/pull/27474
4172 [stab]: https://github.com/rust-lang/rust/pull/28339
4173 [stat]: https://github.com/rust-lang/rust/pull/28321
4174 [vd]: https://github.com/rust-lang/rust/pull/28494
4176 Version 1.3.0 (2015-09-17)
4177 ==============================
4179 * ~900 changes, numerous bugfixes
4184 * The [new object lifetime defaults][nold] have been [turned
4185 on][nold2] after a cycle of warnings about the change. Now types
4186 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4187 being interpreted as `&'a Box<Trait+'a>` to `&'a
4188 Box<Trait+'static>`.
4189 * [The Rustonomicon][nom] is a new book in the official documentation
4190 that dives into writing unsafe Rust.
4191 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4192 timekeeping is employed by other std APIs, as well as out-of-tree
4198 * The [new object lifetime defaults][nold] have been [turned
4199 on][nold2] after a cycle of warnings about the change.
4200 * There is a known [regression][lr] in how object lifetime elision is
4201 interpreted, the proper solution for which is undetermined.
4202 * The `#[prelude_import]` attribute, an internal implementation
4203 detail, was accidentally stabilized previously. [It has been put
4204 behind the `prelude_import` feature gate][pi]. This change is
4205 believed to break no existing code.
4206 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4207 [more sane for dynamically sized types][dst3]. Code that relied on
4208 the previous behavior is thought to be broken.
4209 * The `dropck` rules, which checks that destructors can't access
4210 destroyed values, [have been updated][dropck] to match the
4211 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4212 cause some previously-compiling code to no longer build.
4217 * The [new object lifetime defaults][nold] have been [turned
4218 on][nold2] after a cycle of warnings about the change.
4219 * Semicolons may [now follow types and paths in
4220 macros](https://github.com/rust-lang/rust/pull/27000).
4221 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4222 [more sane for dynamically sized types][dst3]. Code that relied on
4223 the previous behavior is not known to exist, and suspected to be
4225 * `'static` variables [may now be recursive][st].
4226 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4227 implementations correctly.
4228 * The `dropck` rules, which checks that destructors can't access
4229 destroyed values, [have been updated][dropck] to match the
4235 * The [`Duration`] API, [has been stabilized][ds], as well as the
4236 `std::time` module, which presently contains only `Duration`.
4237 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4238 * The owned C string, [`CString`], implements [`Borrow`] and the
4239 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4240 these allow C strings to be borrowed and cloned in generic code.
4241 * [`CStr`] implements [`Debug`].
4242 * [`AtomicPtr`] implements [`Debug`].
4243 * [`Error`] trait objects [can be downcast to their concrete types][e]
4244 in many common configurations, using the [`is`], [`downcast`],
4245 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4247 * Searching for substrings now [employs the two-way algorithm][search]
4248 instead of doing a naive search. This gives major speedups to a
4249 number of methods, including [`contains`][sc], [`find`][sf],
4250 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4251 [`ends_with`][sew] are also faster.
4252 * The performance of `PartialEq` for slices is [much faster][ps].
4253 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4254 is overridden and optimized by the implementations for scalars.
4255 * The [`Hasher`] trait now has a number of specialized `write_*`
4256 methods for primitive types, for efficiency.
4257 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4258 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4259 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4260 of [`std::error::Error::cause`][iec] also delegates to the inner
4262 * [`process::Child`][pc] gained the [`id`] method, which returns a
4263 `u32` representing the platform-specific process identifier.
4264 * The [`connect`] method on slices is deprecated, replaced by the new
4265 [`join`] method (note that both of these are on the *unstable*
4266 [`SliceConcatExt`] trait, but through the magic of the prelude are
4267 available to stable code anyway).
4268 * The [`Div`] operator is implemented for [`Wrapping`] types.
4269 * [`DerefMut` is implemented for `String`][dms].
4270 * Performance of SipHash (the default hasher for `HashMap`) is
4271 [better for long data][sh].
4272 * [`AtomicPtr`] implements [`Send`].
4273 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4274 are now [specialized to use uninitialized buffers for increased
4276 * Lifetime parameters of foreign functions [are now resolved
4282 * Rust can now, with some coercion, [produce programs that run on
4283 Windows XP][xp], though XP is not considered a supported platform.
4284 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4285 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4286 recommended for use in 1.3, though should be fully-functional
4287 in the [64-bit 1.4 beta][b14].
4288 * On Fedora-based systems installation will [properly configure the
4289 dynamic linker][fl].
4290 * The compiler gained many new extended error descriptions, which can
4291 be accessed with the `--explain` flag.
4292 * The `dropck` pass, which checks that destructors can't access
4293 destroyed values, [has been rewritten][dropck]. This fixes some
4294 soundness holes, and as such will cause some previously-compiling
4295 code to no longer build.
4296 * `rustc` now uses [LLVM to write archive files where possible][ar].
4297 Eventually this will eliminate the compiler's dependency on the ar
4299 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4300 supported FreeBSD on x86_64).
4301 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4302 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4304 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4305 will kill the process instead of leaking][nlp].
4307 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4308 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4309 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4310 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4311 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4312 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4313 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4314 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4315 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4316 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4317 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4318 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4319 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4320 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4321 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4322 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4323 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4324 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4325 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4326 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4327 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4328 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4329 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4330 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4331 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4332 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4333 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4334 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4335 [ar]: https://github.com/rust-lang/rust/pull/26926
4336 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4337 [dms]: https://github.com/rust-lang/rust/pull/26241
4338 [dropck]: https://github.com/rust-lang/rust/pull/27261
4339 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4340 [ds]: https://github.com/rust-lang/rust/pull/26818
4341 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4342 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4343 [dst3]: https://github.com/rust-lang/rust/pull/27351
4344 [e]: https://github.com/rust-lang/rust/pull/24793
4345 [f]: https://github.com/rust-lang/rust/pull/26588
4346 [fb]: https://github.com/rust-lang/rust/pull/26959
4347 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4348 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4349 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4350 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4351 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4352 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4353 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4354 [lic]: https://github.com/rust-lang/rust/pull/26583
4355 [lnu]: https://github.com/rust-lang/rust/pull/27026
4356 [lr]: https://github.com/rust-lang/rust/issues/27248
4357 [lum]: https://github.com/rust-lang/rust/pull/26378
4358 [lur]: https://github.com/rust-lang/rust/pull/26783
4359 [nlp]: https://github.com/rust-lang/rust/pull/27176
4360 [nold2]: https://github.com/rust-lang/rust/pull/27045
4361 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4362 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4363 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4364 [pi]: https://github.com/rust-lang/rust/pull/26699
4365 [ps]: https://github.com/rust-lang/rust/pull/26884
4366 [rte]: https://github.com/rust-lang/rust/pull/26950
4367 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4368 [search]: https://github.com/rust-lang/rust/pull/26327
4369 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4370 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4371 [sh]: https://github.com/rust-lang/rust/pull/27280
4372 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4373 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4374 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4375 [st]: https://github.com/rust-lang/rust/pull/26630
4376 [win1]: https://github.com/rust-lang/rust/pull/26569
4377 [win2]: https://github.com/rust-lang/rust/pull/26741
4378 [win3]: https://github.com/rust-lang/rust/pull/26741
4379 [win4]: https://github.com/rust-lang/rust/pull/27210
4380 [xp]: https://github.com/rust-lang/rust/pull/26569
4382 Version 1.2.0 (2015-08-07)
4383 ==========================
4385 * ~1200 changes, numerous bugfixes
4390 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4391 like `Rc` to contain types without a fixed size, arrays and trait
4392 objects, finally enabling use of `Rc<[T]>` and completing the
4393 implementation of DST.
4394 * [Parallel codegen][parcodegen] is now working again, which can
4395 substantially speed up large builds in debug mode; It also gets
4396 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4397 jobs). It's not enabled by default, but will be "in the near
4398 future". It can be activated with the `-C codegen-units=N` flag to
4400 * This is the first release with [experimental support for linking
4401 with the MSVC linker and lib C on Windows (instead of using the GNU
4402 variants via MinGW)][win]. It is yet recommended only for the most
4403 intrepid Rustaceans.
4404 * Benchmark compilations are showing a 30% improvement in
4405 bootstrapping over 1.1.
4410 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4411 unicode case mapping, which is a previously-planned change in
4412 behavior and considered a bugfix.
4413 * [`mem::align_of`] now specifies [the *minimum alignment* for
4414 T][align], which is usually the alignment programs are interested
4415 in, and the same value reported by clang's
4416 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4418 * [The `#[packed]` attribute is no longer silently accepted by the
4419 compiler][packed]. This attribute did nothing and code that
4420 mentioned it likely did not work as intended.
4421 * Associated type defaults are [now behind the
4422 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4423 defaults *did not work*, but could be mentioned syntactically. As
4424 such this breakage has minimal impact.
4429 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4430 matching against dereferencable values.
4435 * The [`Extend`] trait, which grows a collection from an iterator, is
4436 implemented over iterators of references, for `String`, `Vec`,
4437 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4438 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4439 * The [`iter::once`] function returns an iterator that yields a single
4440 element, and [`iter::empty`] returns an iterator that yields no
4442 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4443 over substring matches.
4444 * [`Cell`] and [`RefCell`] both implement `Eq`.
4445 * A number of methods for wrapping arithmetic are added to the
4446 integral types, [`wrapping_div`], [`wrapping_rem`],
4447 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4448 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4449 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4450 type.. It is illegal for the default arithmetic operations in Rust
4451 to overflow; the desire to wrap must be explicit.
4452 * The `{:#?}` formatting specifier [displays the alternate,
4453 pretty-printed][debugfmt] form of the `Debug` formatter. This
4454 feature was actually introduced prior to 1.0 with little
4456 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4457 for writing data to formatted strings, similar to [`io::Write`].
4458 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4459 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4460 are used by code generators to emit implementations of [`Debug`].
4461 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4462 methods that convert case, following Unicode case mapping.
4463 * It is now easier to handle poisoned locks. The [`PoisonError`]
4464 type, returned by failing lock operations, exposes `into_inner`,
4465 `get_ref`, and `get_mut`, which all give access to the inner lock
4466 guard, and allow the poisoned lock to continue to operate. The
4467 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4468 poisoned lock without attempting to take the lock.
4469 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4470 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4471 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4472 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4474 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4480 * `rustc` employs smarter heuristics for guessing at [typos].
4481 * `rustc` emits more efficient code for [no-op conversions between
4482 unsafe pointers][nop].
4483 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4484 resulting in faster compile times and smaller code.
4486 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4487 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4488 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4489 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4490 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4491 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4492 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4493 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4494 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4495 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4496 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4497 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4498 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4499 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4500 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4501 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4502 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4503 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4504 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4505 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4506 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4507 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4508 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4509 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4510 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4511 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4512 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4513 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4514 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4515 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4516 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4517 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4518 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4519 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4520 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4521 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4522 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4523 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4524 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4525 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4526 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4527 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4528 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4529 [align]: https://github.com/rust-lang/rust/pull/25646
4530 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4531 [typos]: https://github.com/rust-lang/rust/pull/26087
4532 [nop]: https://github.com/rust-lang/rust/pull/26336
4533 [fat]: https://github.com/rust-lang/rust/pull/26411
4534 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4535 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4536 [packed]: https://github.com/rust-lang/rust/pull/25541
4537 [ad]: https://github.com/rust-lang/rust/pull/27382
4538 [win]: https://github.com/rust-lang/rust/pull/25350
4540 Version 1.1.0 (2015-06-25)
4541 =========================
4543 * ~850 changes, numerous bugfixes
4548 * The [`std::fs` module has been expanded][fs] to expand the set of
4549 functionality exposed:
4550 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4551 don't incur a syscall on some platforms.
4552 * A `symlink_metadata` function has been added.
4553 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4554 access to all underlying information.
4555 * The compiler now contains extended explanations of many errors. When an error
4556 with an explanation occurs the compiler suggests using the `--explain` flag
4557 to read the explanation. Error explanations are also [available online][err-index].
4558 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4559 well as other work, the time to bootstrap the compiler decreased by
4565 * The [`str::split_whitespace`] method splits a string on unicode
4566 whitespace boundaries.
4567 * On both Windows and Unix, new extension traits provide conversion of
4568 I/O types to and from the underlying system handles. On Unix, these
4569 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4570 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4571 `TcpListener`, and `UpdSocket`. Further implementations for
4572 `std::process` will be stabilized later.
4573 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4574 Windows, symlinks can be created with
4575 `std::os::windows::symlink_dir` and
4576 `std::os::windows::symlink_file`.
4577 * The `mpsc::Receiver` type can now be converted into an iterator with
4578 `into_iter` on the [`IntoIterator`] trait.
4579 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4580 implementation of the [`From`] trait.
4581 * The `Debug` implementation for `RangeFull` [creates output that is
4582 more consistent with other implementations][rf].
4583 * [`Debug` is implemented for `File`][file].
4584 * The `Default` implementation for `Arc` [no longer requires `Sync +
4586 * [The `Iterator` methods `count`, `nth`, and `last` have been
4587 overridden for slices to have O(1) performance instead of O(n)][si].
4588 * Incorrect handling of paths on Windows has been improved in both the
4589 compiler and the standard library.
4590 * [`AtomicPtr` gained a `Default` implementation][ap].
4591 * In accordance with Rust's policy on arithmetic overflow `abs` now
4592 [panics on overflow when debug assertions are enabled][abs].
4593 * The [`Cloned`] iterator, which was accidentally left unstable for
4594 1.0 [has been stabilized][c].
4595 * The [`Incoming`] iterator, which iterates over incoming TCP
4596 connections, and which was accidentally unnamable in 1.0, [is now
4597 properly exported][inc].
4598 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4599 `sift_up` or `sift_down` panic][bh].
4600 * The [`split_off`] method of `LinkedList` [no longer corrupts
4601 the list in certain scenarios][ll].
4606 * Type checking performance [has improved notably][sk] with
4607 [multiple improvements][pre].
4608 * The compiler [suggests code changes][ch] for more errors.
4609 * rustc and it's build system have experimental support for [building
4610 toolchains against MUSL][m] instead of glibc on Linux.
4611 * The compiler defines the `target_env` cfg value, which is used for
4612 distinguishing toolchains that are otherwise for the same
4613 platform. Presently this is set to `gnu` for common GNU Linux
4614 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4615 * The [`cargo rustc`][crc] command invokes a build with custom flags
4617 * [Android executables are always position independent][pie].
4618 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
4621 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
4622 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4623 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4624 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
4625 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
4626 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
4627 [rf]: https://github.com/rust-lang/rust/pull/24491
4628 [err-index]: https://doc.rust-lang.org/error-index.html
4629 [sk]: https://github.com/rust-lang/rust/pull/24615
4630 [pre]: https://github.com/rust-lang/rust/pull/25323
4631 [file]: https://github.com/rust-lang/rust/pull/24598
4632 [ch]: https://github.com/rust-lang/rust/pull/24683
4633 [arc]: https://github.com/rust-lang/rust/pull/24695
4634 [si]: https://github.com/rust-lang/rust/pull/24701
4635 [ap]: https://github.com/rust-lang/rust/pull/24834
4636 [m]: https://github.com/rust-lang/rust/pull/24777
4637 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
4638 [crc]: https://github.com/rust-lang/cargo/pull/1568
4639 [pie]: https://github.com/rust-lang/rust/pull/24953
4640 [abs]: https://github.com/rust-lang/rust/pull/25441
4641 [c]: https://github.com/rust-lang/rust/pull/25496
4642 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
4643 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
4644 [inc]: https://github.com/rust-lang/rust/pull/25522
4645 [bh]: https://github.com/rust-lang/rust/pull/25856
4646 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
4647 [ll]: https://github.com/rust-lang/rust/pull/26022
4648 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
4649 [drop]: https://github.com/rust-lang/rust/pull/24935
4651 Version 1.0.0 (2015-05-15)
4652 ========================
4654 * ~1500 changes, numerous bugfixes
4659 * The vast majority of the standard library is now `#[stable]`. It is
4660 no longer possible to use unstable features with a stable build of
4662 * Many popular crates on [crates.io] now work on the stable release
4664 * Arithmetic on basic integer types now [checks for overflow in debug
4670 * Several [restrictions have been added to trait coherence][coh] in
4671 order to make it easier for upstream authors to change traits
4672 without breaking downstream code.
4673 * Digits of binary and octal literals are [lexed more eagerly][lex] to
4674 improve error messages and macro behavior. For example, `0b1234` is
4675 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
4676 * Trait bounds [are always invariant][inv], eliminating the need for
4677 the `PhantomFn` and `MarkerTrait` lang items, which have been
4679 * ["-" is no longer a valid character in crate names][cr], the `extern crate
4680 "foo" as bar` syntax has been replaced with `extern crate foo as
4681 bar`, and Cargo now automatically translates "-" in *package* names
4682 to underscore for the crate name.
4683 * [Lifetime shadowing is an error][lt].
4684 * [`Send` no longer implies `'static`][send-rfc].
4685 * [UFCS now supports trait-less associated paths][moar-ufcs] like
4686 `MyType::default()`.
4687 * Primitive types [now have inherent methods][prim-inherent],
4688 obviating the need for extension traits like `SliceExt`.
4689 * Methods with `Self: Sized` in their `where` clause are [considered
4690 object-safe][self-sized], allowing many extension traits like
4691 `IteratorExt` to be merged into the traits they extended.
4692 * You can now [refer to associated types][assoc-where] whose
4693 corresponding trait bounds appear only in a `where` clause.
4694 * The final bits of [OIBIT landed][oibit-final], meaning that traits
4695 like `Send` and `Sync` are now library-defined.
4696 * A [Reflect trait][reflect] was introduced, which means that
4697 downcasting via the `Any` trait is effectively limited to concrete
4698 types. This helps retain the potentially-important "parametricity"
4699 property: generic code cannot behave differently for different type
4700 arguments except in minor ways.
4701 * The `unsafe_destructor` feature is now deprecated in favor of the
4702 [new `dropck`][dropck]. This change is a major reduction in unsafe
4708 * The `thread_local` module [has been renamed to `std::thread`][th].
4709 * The methods of `IteratorExt` [have been moved to the `Iterator`
4711 * Several traits that implement Rust's conventions for type
4712 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
4713 [centralized in the `std::convert` module][con].
4714 * The `FromError` trait [was removed in favor of `From`][fe].
4715 * The basic sleep function [has moved to
4716 `std::thread::sleep_ms`][slp].
4717 * The `splitn` function now takes an `n` parameter that represents the
4718 number of items yielded by the returned iterator [instead of the
4719 number of 'splits'][spl].
4720 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4721 * [Derived implementations of `PartialOrd` now order enums according
4722 to their explicitly-assigned discriminants][po].
4723 * [Methods for searching strings are generic over `Pattern`s][pat],
4724 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4726 * [In method resolution, object methods are resolved before inherent
4728 * [`String::from_str` has been deprecated in favor of the `From` impl,
4729 `String::from`][sf].
4730 * [`io::Error` implements `Sync`][ios].
4731 * [The `words` method on `&str` has been replaced with
4732 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4734 * The new path and IO modules are complete and `#[stable]`. This
4735 was the major library focus for this cycle.
4736 * The path API was [revised][path-normalize] to normalize `.`,
4737 adjusting the tradeoffs in favor of the most common usage.
4738 * A large number of remaining APIs in `std` were also stabilized
4739 during this cycle; about 75% of the non-deprecated API surface
4741 * The new [string pattern API][string-pattern] landed, which makes
4742 the string slice API much more internally consistent and flexible.
4743 * A new set of [generic conversion traits][conversion] replaced
4744 many existing ad hoc traits.
4745 * Generic numeric traits were [completely removed][num-traits]. This
4746 was made possible thanks to inherent methods for primitive types,
4747 and the removal gives maximal flexibility for designing a numeric
4748 hierarchy in the future.
4749 * The `Fn` traits are now related via [inheritance][fn-inherit]
4750 and provide ergonomic [blanket implementations][fn-blanket].
4751 * The `Index` and `IndexMut` traits were changed to
4752 [take the index by value][index-value], enabling code like
4753 `hash_map["string"]` to work.
4754 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4755 `Copy` data is known to be `Clone` as well.
4760 * Many errors now have extended explanations that can be accessed with
4761 the `--explain` flag to `rustc`.
4762 * Many new examples have been added to the standard library
4764 * rustdoc has received a number of improvements focused on completion
4766 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4767 * Much headway was made on ecosystem-wide CI, making it possible
4768 to [compare builds for breakage][ci-compare].
4771 [crates.io]: http://crates.io
4772 [clo]: https://github.com/rust-lang/rust/pull/24034
4773 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4774 [con]: https://github.com/rust-lang/rust/pull/23875
4775 [cr]: https://github.com/rust-lang/rust/pull/23419
4776 [fe]: https://github.com/rust-lang/rust/pull/23879
4777 [ie]: https://github.com/rust-lang/rust/pull/23300
4778 [inv]: https://github.com/rust-lang/rust/pull/23938
4779 [ios]: https://github.com/rust-lang/rust/pull/24133
4780 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4781 [lt]: https://github.com/rust-lang/rust/pull/24057
4782 [meth]: https://github.com/rust-lang/rust/pull/24056
4783 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4784 [po]: https://github.com/rust-lang/rust/pull/24270
4785 [sf]: https://github.com/rust-lang/rust/pull/24517
4786 [slp]: https://github.com/rust-lang/rust/pull/23949
4787 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4788 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4789 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4790 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4791 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4792 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4793 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4794 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4795 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4796 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4797 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4798 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4799 [reflect]: https://github.com/rust-lang/rust/pull/23712
4800 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4801 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4802 [index-value]: https://github.com/rust-lang/rust/pull/23601
4803 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4804 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4805 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4806 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4807 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4808 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4811 Version 1.0.0-alpha.2 (2015-02-20)
4812 =====================================
4814 * ~1300 changes, numerous bugfixes
4818 * The various I/O modules were [overhauled][io-rfc] to reduce
4819 unnecessary abstractions and provide better interoperation with
4820 the underlying platform. The old `io` module remains temporarily
4822 * The standard library now [participates in feature gating][feat],
4823 so use of unstable libraries now requires a `#![feature(...)]`
4824 attribute. The impact of this change is [described on the
4825 forum][feat-forum]. [RFC][feat-rfc].
4829 * `for` loops [now operate on the `IntoIterator` trait][into],
4830 which eliminates the need to call `.iter()`, etc. to iterate
4831 over collections. There are some new subtleties to remember
4832 though regarding what sort of iterators various types yield, in
4833 particular that `for foo in bar { }` yields values from a move
4834 iterator, destroying the original collection. [RFC][into-rfc].
4835 * Objects now have [default lifetime bounds][obj], so you don't
4836 have to write `Box<Trait+'static>` when you don't care about
4837 storing references. [RFC][obj-rfc].
4838 * In types that implement `Drop`, [lifetimes must outlive the
4839 value][drop]. This will soon make it possible to safely
4840 implement `Drop` for types where `#[unsafe_destructor]` is now
4841 required. Read the [gorgeous RFC][drop-rfc] for details.
4842 * The fully qualified <T as Trait>::X syntax lets you set the Self
4843 type for a trait method or associated type. [RFC][ufcs-rfc].
4844 * References to types that implement `Deref<U>` now [automatically
4845 coerce to references][deref] to the dereferenced type `U`,
4846 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
4847 should eliminate many unsightly uses of `&*`, as when converting
4848 from references to vectors into references to
4849 slices. [RFC][deref-rfc].
4850 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
4851 `|:|`) is obsolete and closure kind is inferred from context.
4852 * [`Self` is a keyword][Self].
4856 * The `Show` and `String` formatting traits [have been
4857 renamed][fmt] to `Debug` and `Display` to more clearly reflect
4858 their related purposes. Automatically getting a string
4859 conversion to use with `format!("{:?}", something_to_debug)` is
4860 now written `#[derive(Debug)]`.
4861 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
4862 OsStr}`, provide strings in platform-specific encodings for easier
4863 interop with system APIs. [RFC][osstr-rfc].
4864 * The `boxed::into_raw` and `Box::from_raw` functions [convert
4865 between `Box<T>` and `*mut T`][boxraw], a common pattern for
4866 creating raw pointers.
4870 * Certain long error messages of the form 'expected foo found bar'
4871 are now [split neatly across multiple
4872 lines][multiline]. Examples in the PR.
4873 * On Unix Rust can be [uninstalled][un] by running
4874 `/usr/local/lib/rustlib/uninstall.sh`.
4875 * The `#[rustc_on_unimplemented]` attribute, requiring the
4876 'on_unimplemented' feature, lets rustc [display custom error
4877 messages when a trait is expected to be implemented for a type
4882 * Rust is tested against a [LALR grammar][lalr], which parses
4883 almost all the Rust files that rustc does.
4885 [boxraw]: https://github.com/rust-lang/rust/pull/21318
4886 [close]: https://github.com/rust-lang/rust/pull/21843
4887 [deref]: https://github.com/rust-lang/rust/pull/21351
4888 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
4889 [drop]: https://github.com/rust-lang/rust/pull/21972
4890 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4891 [feat]: https://github.com/rust-lang/rust/pull/21248
4892 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
4893 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
4894 [fmt]: https://github.com/rust-lang/rust/pull/21457
4895 [into]: https://github.com/rust-lang/rust/pull/20790
4896 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
4897 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4898 [lalr]: https://github.com/rust-lang/rust/pull/21452
4899 [multiline]: https://github.com/rust-lang/rust/pull/19870
4900 [obj]: https://github.com/rust-lang/rust/pull/22230
4901 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
4902 [onun]: https://github.com/rust-lang/rust/pull/20889
4903 [osstr]: https://github.com/rust-lang/rust/pull/21488
4904 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4905 [Self]: https://github.com/rust-lang/rust/pull/22158
4906 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
4907 [un]: https://github.com/rust-lang/rust/pull/22256
4910 Version 1.0.0-alpha (2015-01-09)
4911 ==================================
4913 * ~2400 changes, numerous bugfixes
4917 * The language itself is considered feature complete for 1.0,
4918 though there will be many usability improvements and bugfixes
4919 before the final release.
4920 * Nearly 50% of the public API surface of the standard library has
4921 been declared 'stable'. Those interfaces are unlikely to change
4923 * The long-running debate over integer types has been
4924 [settled][ints]: Rust will ship with types named `isize` and
4925 `usize`, rather than `int` and `uint`, for pointer-sized
4926 integers. Guidelines will be rolled out during the alpha cycle.
4927 * Most crates that are not `std` have been moved out of the Rust
4928 distribution into the Cargo ecosystem so they can evolve
4929 separately and don't need to be stabilized as quickly, including
4930 'time', 'getopts', 'num', 'regex', and 'term'.
4931 * Documentation continues to be expanded with more API coverage, more
4932 examples, and more in-depth explanations. The guides have been
4933 consolidated into [The Rust Programming Language][trpl].
4934 * "[Rust By Example][rbe]" is now maintained by the Rust team.
4935 * All official Rust binary installers now come with [Cargo], the
4936 Rust package manager.
4940 * Closures have been [completely redesigned][unboxed] to be
4941 implemented in terms of traits, can now be used as generic type
4942 bounds and thus monomorphized and inlined, or via an opaque
4943 pointer (boxed) as in the old system. The new system is often
4944 referred to as 'unboxed' closures.
4945 * Traits now support [associated types][assoc], allowing families
4946 of related types to be defined together and used generically in
4948 * Enum variants are [namespaced by their type names][enum].
4949 * [`where` clauses][where] provide a more versatile and attractive
4950 syntax for specifying generic bounds, though the previous syntax
4952 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
4954 * Rust [no longer has a runtime][rt] of any description, and only
4955 supports OS threads, not green threads.
4956 * At long last, Rust has been overhauled for 'dynamically-sized
4957 types' ([DST]), which integrates 'fat pointers' (object types,
4958 arrays, and `str`) more deeply into the type system, making it
4960 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
4961 `..j` that produce range types and which, when combined with the
4962 `Index` operator and multidispatch, leads to a convenient slice
4964 * The new range syntax revealed an ambiguity in the fixed-length
4965 array syntax, so now fixed length arrays [are written `[T;
4967 * The `Copy` trait is no longer implemented automatically. Unsafe
4968 pointers no longer implement `Sync` and `Send` so types
4969 containing them don't automatically either. `Sync` and `Send`
4970 are now 'unsafe traits' so one can "forcibly" implement them via
4971 `unsafe impl` if a type confirms to the requirements for them
4972 even though the internals do not (e.g. structs containing unsafe
4973 pointers like `Arc`). These changes are intended to prevent some
4974 footguns and are collectively known as [opt-in built-in
4975 traits][oibit] (though `Sync` and `Send` will soon become pure
4976 library types unknown to the compiler).
4977 * Operator traits now take their operands [by value][ops], and
4978 comparison traits can use multidispatch to compare one type
4979 against multiple other types, allowing e.g. `String` to be
4980 compared with `&str`.
4981 * `if let` and `while let` are no longer feature-gated.
4982 * Rust has adopted a more [uniform syntax for escaping unicode
4983 characters][unicode].
4984 * `macro_rules!` [has been declared stable][mac]. Though it is a
4985 flawed system it is sufficiently popular that it must be usable
4986 for 1.0. Effort has gone into [future-proofing][mac-future] it
4987 in ways that will allow other macro systems to be developed in
4988 parallel, and won't otherwise impact the evolution of the
4990 * The prelude has been [pared back significantly][prelude] such
4991 that it is the minimum necessary to support the most pervasive
4992 code patterns, and through [generalized where clauses][where]
4993 many of the prelude extension traits have been consolidated.
4994 * Rust's rudimentary reflection [has been removed][refl], as it
4995 incurred too much code generation for little benefit.
4996 * [Struct variants][structvars] are no longer feature-gated.
4997 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
4998 known as 'higher-ranked trait bounds', this crucially allows
4999 unboxed closures to work.
5000 * Macros invocations surrounded by parens or square brackets and
5001 not terminated by a semicolon are [parsed as
5002 expressions][macros], which makes expressions like `vec![1i32,
5003 2, 3].len()` work as expected.
5004 * Trait objects now implement their traits automatically, and
5005 traits that can be coerced to objects now must be [object
5007 * Automatically deriving traits is now done with `#[derive(...)]`
5008 not `#[deriving(...)]` for [consistency with other naming
5009 conventions][derive].
5010 * Importing the containing module or enum at the same time as
5011 items or variants they contain is [now done with `self` instead
5012 of `mod`][self], as in use `foo::{self, bar}`
5013 * Glob imports are no longer feature-gated.
5014 * The `box` operator and `box` patterns have been feature-gated
5015 pending a redesign. For now unique boxes should be allocated
5016 like other containers, with `Box::new`.
5020 * A [series][coll1] of [efforts][coll2] to establish
5021 [conventions][coll3] for collections types has resulted in API
5022 improvements throughout the standard library.
5023 * New [APIs for error handling][err] provide ergonomic interop
5024 between error types, and [new conventions][err-conv] describe
5025 more clearly the recommended error handling strategies in Rust.
5026 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5027 it is easier to discuss failure in the context of error handling
5028 without making clarifications as to whether you are referring to
5029 the 'fail' macro or failure more generally.
5030 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5031 syscall when available.
5032 * The 'serialize' crate has been renamed 'rustc-serialize' and
5033 moved out of the distribution to Cargo. Although it is widely
5034 used now, it is expected to be superseded in the near future.
5035 * The `Show` formatter, typically implemented with
5036 `#[derive(Show)]` is [now requested with the `{:?}`
5037 specifier][show] and is intended for use by all types, for uses
5038 such as `println!` debugging. The new `String` formatter must be
5039 implemented by hand, uses the `{}` specifier, and is intended
5040 for full-fidelity conversions of things that can logically be
5041 represented as strings.
5045 * [Flexible target specification][flex] allows rustc's code
5046 generation to be configured to support otherwise-unsupported
5048 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5049 respective debuggers with Rust-appropriate pretty-printing.
5050 * The Windows installation of Rust is distributed with the
5051 MinGW components currently required to link binaries on that
5056 * Nullable enum optimizations have been extended to more types so
5057 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5058 space than the inner types themselves.
5059 * Work has begun on supporting AArch64.
5061 [Cargo]: https://crates.io
5062 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5063 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5064 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5065 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5066 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5067 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5068 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5069 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5070 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5071 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5072 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5073 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5074 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5075 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5076 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5077 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5078 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5079 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5080 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5081 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5082 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5083 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5084 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5085 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5086 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5087 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5088 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5089 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5090 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5091 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5092 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5093 [trpl]: https://doc.rust-lang.org/book/index.html
5094 [rbe]: http://rustbyexample.com/
5097 Version 0.12.0 (2014-10-09)
5098 =============================
5100 * ~1900 changes, numerous bugfixes
5104 * The introductory documentation (now called The Rust Guide) has
5105 been completely rewritten, as have a number of supplementary
5107 * Rust's package manager, Cargo, continues to improve and is
5108 sometimes considered to be quite awesome.
5109 * Many API's in `std` have been reviewed and updated for
5110 consistency with the in-development Rust coding
5111 guidelines. The standard library documentation tracks
5112 stabilization progress.
5113 * Minor libraries have been moved out-of-tree to the rust-lang org
5114 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5115 be installed with Cargo.
5116 * Lifetime elision allows lifetime annotations to be left off of
5117 function declarations in many common scenarios.
5118 * Rust now works on 64-bit Windows.
5121 * Indexing can be overloaded with the `Index` and `IndexMut`
5123 * The `if let` construct takes a branch only if the `let` pattern
5124 matches, currently behind the 'if_let' feature gate.
5125 * 'where clauses', a more flexible syntax for specifying trait
5126 bounds that is more aesthetic, have been added for traits and
5127 free functions. Where clauses will in the future make it
5128 possible to constrain associated types, which would be
5129 impossible with the existing syntax.
5130 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5131 the 'slicing_syntax' feature gate, and can be overloaded with
5132 the `Slice` or `SliceMut` traits.
5133 * The syntax for matching of sub-slices has been changed to use a
5134 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5135 consistency with other uses of `..` and to future-proof
5136 potential additional uses of the syntax.
5137 * The syntax for matching inclusive ranges in patterns has changed
5138 from `0..3` to `0...4` to be consistent with the exclusive range
5140 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5141 c]`) has been put behind the 'advanced_slice_patterns' feature
5142 gate and may be removed in the future.
5143 * Components of tuples and tuple structs can be extracted using
5144 the `value.0` syntax, currently behind the `tuple_indexing`
5146 * The `#[crate_id]` attribute is no longer supported; versioning
5147 is handled by the package manager.
5148 * Renaming crate imports are now written `extern crate foo as bar`
5149 instead of `extern crate bar = foo`.
5150 * Renaming use statements are now written `use foo as bar` instead
5152 * `let` and `match` bindings and argument names in macros are now
5154 * The new, more efficient, closure types ('unboxed closures') have
5155 been added under a feature gate, 'unboxed_closures'. These will
5156 soon replace the existing closure types, once higher-ranked
5157 trait lifetimes are added to the language.
5158 * `move` has been added as a keyword, for indicating closures
5159 that capture by value.
5160 * Mutation and assignment is no longer allowed in pattern guards.
5161 * Generic structs and enums can now have trait bounds.
5162 * The `Share` trait is now called `Sync` to free up the term
5163 'shared' to refer to 'shared reference' (the default reference
5165 * Dynamically-sized types have been mostly implemented,
5166 unifying the behavior of fat-pointer types with the rest of the
5168 * As part of dynamically-sized types, the `Sized` trait has been
5169 introduced, which qualifying types implement by default, and
5170 which type parameters expect by default. To specify that a type
5171 parameter does not need to be sized, write `<Sized? T>`. Most
5172 types are `Sized`, notable exceptions being unsized arrays
5173 (`[T]`) and trait types.
5174 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5175 * Lifetime bounds can now be applied to type parameters and object
5177 * The old, reference counted GC type, `Gc<T>` which was once
5178 denoted by the `@` sigil, has finally been removed. GC will be
5179 revisited in the future.
5182 * Library documentation has been improved for a number of modules.
5183 * Bit-vectors, collections::bitv has been modernized.
5184 * The url crate is deprecated in favor of
5185 http://github.com/servo/rust-url, which can be installed with
5187 * Most I/O stream types can be cloned and subsequently closed from
5189 * A `std::time::Duration` type has been added for use in I/O
5190 methods that rely on timers, as well as in the 'time' crate's
5191 `Timespec` arithmetic.
5192 * The runtime I/O abstraction layer that enabled the green thread
5193 scheduler to do non-thread-blocking I/O has been removed, along
5194 with the libuv-based implementation employed by the green thread
5195 scheduler. This will greatly simplify the future I/O work.
5196 * `collections::btree` has been rewritten to have a more
5197 idiomatic and efficient design.
5200 * rustdoc output now indicates the stability levels of API's.
5201 * The `--crate-name` flag can specify the name of the crate
5202 being compiled, like `#[crate_name]`.
5203 * The `-C metadata` specifies additional metadata to hash into
5204 symbol names, and `-C extra-filename` specifies additional
5205 information to put into the output filename, for use by the
5206 package manager for versioning.
5207 * debug info generation has continued to improve and should be
5208 more reliable under both gdb and lldb.
5209 * rustc has experimental support for compiling in parallel
5210 using the `-C codegen-units` flag.
5211 * rustc no longer encodes rpath information into binaries by
5215 * Stack usage has been optimized with LLVM lifetime annotations.
5216 * Official Rust binaries on Linux are more compatible with older
5217 kernels and distributions, built on CentOS 5.10.
5220 Version 0.11.0 (2014-07-02)
5221 ==========================
5223 * ~1700 changes, numerous bugfixes
5226 * ~[T] has been removed from the language. This type is superseded by
5228 * ~str has been removed from the language. This type is superseded by
5230 * ~T has been removed from the language. This type is superseded by the
5232 * @T has been removed from the language. This type is superseded by the
5233 standard library's std::gc::Gc<T> type.
5234 * Struct fields are now all private by default.
5235 * Vector indices and shift amounts are both required to be a `uint`
5236 instead of any integral type.
5237 * Byte character, byte string, and raw byte string literals are now all
5238 supported by prefixing the normal literal with a `b`.
5239 * Multiple ABIs are no longer allowed in an ABI string
5240 * The syntax for lifetimes on closures/procedures has been tweaked
5241 slightly: `<'a>|A, B|: 'b + K -> T`
5242 * Floating point modulus has been removed from the language; however it
5243 is still provided by a library implementation.
5244 * Private enum variants are now disallowed.
5245 * The `priv` keyword has been removed from the language.
5246 * A closure can no longer be invoked through a &-pointer.
5247 * The `use foo, bar, baz;` syntax has been removed from the language.
5248 * The transmute intrinsic no longer works on type parameters.
5249 * Statics now allow blocks/items in their definition.
5250 * Trait bounds are separated from objects with + instead of : now.
5251 * Objects can no longer be read while they are mutably borrowed.
5252 * The address of a static is now marked as insignificant unless the
5253 #[inline(never)] attribute is placed it.
5254 * The #[unsafe_destructor] attribute is now behind a feature gate.
5255 * Struct literals are no longer allowed in ambiguous positions such as
5256 if, while, match, and for..in.
5257 * Declaration of lang items and intrinsics are now feature-gated by
5259 * Integral literals no longer default to `int`, and floating point
5260 literals no longer default to `f64`. Literals must be suffixed with an
5261 appropriate type if inference cannot determine the type of the
5263 * The Box<T> type is no longer implicitly borrowed to &mut T.
5264 * Procedures are now required to not capture borrowed references.
5267 * The standard library is now a "facade" over a number of underlying
5268 libraries. This means that development on the standard library should
5269 be speedier due to smaller crates, as well as a clearer line between
5271 * A new library, libcore, lives under the standard library's facade
5272 which is Rust's "0-assumption" library, suitable for embedded and
5273 kernel development for example.
5274 * A regex crate has been added to the standard distribution. This crate
5275 includes statically compiled regular expressions.
5276 * The unwrap/unwrap_err methods on Result require a Show bound for
5277 better error messages.
5278 * The return types of the std::comm primitives have been centralized
5279 around the Result type.
5280 * A number of I/O primitives have gained the ability to time out their
5282 * A number of I/O primitives have gained the ability to close their
5283 reading/writing halves to cancel pending operations.
5284 * Reverse iterator methods have been removed in favor of `rev()` on
5285 their forward-iteration counterparts.
5286 * A bitflags! macro has been added to enable easy interop with C and
5287 management of bit flags.
5288 * A debug_assert! macro is now provided which is disabled when
5289 `--cfg ndebug` is passed to the compiler.
5290 * A graphviz crate has been added for creating .dot files.
5291 * The std::cast module has been migrated into std::mem.
5292 * The std::local_data api has been migrated from freestanding functions
5293 to being based on methods.
5294 * The Pod trait has been renamed to Copy.
5295 * jemalloc has been added as the default allocator for types.
5296 * The API for allocating memory has been changed to use proper alignment
5297 and sized deallocation
5298 * Connecting a TcpStream or binding a TcpListener is now based on a
5299 string address and a u16 port. This allows connecting to a hostname as
5301 * The Reader trait now contains a core method, read_at_least(), which
5302 correctly handles many repeated 0-length reads.
5303 * The process-spawning API is now centered around a builder-style
5305 * The :? printing qualifier has been moved from the standard library to
5306 an external libdebug crate.
5307 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5308 have been renamed to Eq/Ord.
5309 * The select/plural methods have been removed from format!. The escapes
5310 for { and } have also changed from \{ and \} to {{ and }},
5312 * The TaskBuilder API has been re-worked to be a true builder, and
5313 extension traits for spawning native/green tasks have been added.
5316 * All breaking changes to the language or libraries now have their
5317 commit message annotated with `[breaking-change]` to allow for easy
5318 discovery of breaking changes.
5319 * The compiler will now try to suggest how to annotate lifetimes if a
5320 lifetime-related error occurs.
5321 * Debug info continues to be improved greatly with general bug fixes and
5322 better support for situations like link time optimization (LTO).
5323 * Usage of syntax extensions when cross-compiling has been fixed.
5324 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5325 -fdata-sections and --gc-sections has been enabled by default
5326 * The compiler is now stricter about where it will load module files
5327 from when a module is declared via `mod foo;`.
5328 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5329 Syntax extensions are now discovered via a "plugin registrar" type
5330 which will be extended in the future to other various plugins.
5331 * Lints have been restructured to allow for dynamically loadable lints.
5332 * A number of rustdoc improvements:
5333 * The HTML output has been visually redesigned.
5334 * Markdown is now powered by hoedown instead of sundown.
5335 * Searching heuristics have been greatly improved.
5336 * The search index has been reduced in size by a great amount.
5337 * Cross-crate documentation via `pub use` has been greatly improved.
5338 * Primitive types are now hyperlinked and documented.
5339 * Documentation has been moved from static.rust-lang.org/doc to
5341 * A new sandbox, play.rust-lang.org, is available for running and
5342 sharing rust code examples on-line.
5343 * Unused attributes are now more robustly warned about.
5344 * The dead_code lint now warns about unused struct fields.
5345 * Cross-compiling to iOS is now supported.
5346 * Cross-compiling to mipsel is now supported.
5347 * Stability attributes are now inherited by default and no longer apply
5348 to intra-crate usage, only inter-crate usage.
5349 * Error message related to non-exhaustive match expressions have been
5353 Version 0.10 (2014-04-03)
5354 =========================
5356 * ~1500 changes, numerous bugfixes
5359 * A new RFC process is now in place for modifying the language.
5360 * Patterns with `@`-pointers have been removed from the language.
5361 * Patterns with unique vectors (`~[T]`) have been removed from the
5363 * Patterns with unique strings (`~str`) have been removed from the
5365 * `@str` has been removed from the language.
5366 * `@[T]` has been removed from the language.
5367 * `@self` has been removed from the language.
5368 * `@Trait` has been removed from the language.
5369 * Headers on `~` allocations which contain `@` boxes inside the type for
5370 reference counting have been removed.
5371 * The semantics around the lifetimes of temporary expressions have changed,
5372 see #3511 and #11585 for more information.
5373 * Cross-crate syntax extensions are now possible, but feature gated. See
5374 #11151 for more information. This includes both `macro_rules!` macros as
5375 well as syntax extensions such as `format!`.
5376 * New lint modes have been added, and older ones have been turned on to be
5378 * Unnecessary parentheses
5381 * Uppercase variables
5382 * Publicly visible private types
5383 * `#[deriving]` with raw pointers
5384 * Unsafe functions can no longer be coerced to closures.
5385 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5386 * The `#[simd]` attribute is now behind a feature gate.
5387 * Visibility is no longer allowed on `extern crate` statements, and
5388 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5389 * Trailing commas are now allowed in argument lists and tuple patterns.
5390 * The `do` keyword has been removed, it is now a reserved keyword.
5391 * Default type parameters have been implemented, but are feature gated.
5392 * Borrowed variables through captures in closures are now considered soundly.
5393 * `extern mod` is now `extern crate`
5394 * The `Freeze` trait has been removed.
5395 * The `Share` trait has been added for types that can be shared among
5397 * Labels in macros are now hygienic.
5398 * Expression/statement macro invocations can be delimited with `{}` now.
5399 * Treatment of types allowed in `static mut` locations has been tweaked.
5400 * The `*` and `.` operators are now overloadable through the `Deref` and
5402 * `~Trait` and `proc` no longer have `Send` bounds by default.
5403 * Partial type hints are now supported with the `_` type marker.
5404 * An `Unsafe` type was introduced for interior mutability. It is now
5405 considered undefined to transmute from `&T` to `&mut T` without using the
5407 * The #[linkage] attribute was implemented for extern statics/functions.
5408 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5409 * `Pod` was renamed to `Copy`.
5412 * The `libextra` library has been removed. It has now been decomposed into
5413 component libraries with smaller and more focused nuggets of
5414 functionality. The full list of libraries can be found on the
5415 documentation index page.
5416 * std: `std::condition` has been removed. All I/O errors are now propagated
5417 through the `Result` type. In order to assist with error handling, a
5418 `try!` macro for unwrapping errors with an early return and a lint for
5419 unused results has been added. See #12039 for more information.
5420 * std: The `vec` module has been renamed to `slice`.
5421 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5422 This will become the only growable vector in the future.
5423 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5424 are now found at `std::io::BufferedReader` instead of
5425 `std::io::buffered::BufferedReader`.
5426 * std: `print` and `println` are no longer in the prelude, the `print!` and
5427 `println!` macros are intended to be used instead.
5428 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5429 attempts to statically prevent cycles.
5430 * std: The standard distribution is adopting the policy of pushing failure
5431 to the user rather than failing in libraries. Many functions (such as
5432 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5433 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5434 deriving mode: `#[deriving(Show)]`.
5435 * std: `ToStr` is now implemented for all types implementing `Show`.
5436 * std: The formatting trait methods now take `&self` instead of `&T`
5437 * std: The `invert()` method on iterators has been renamed to `rev()`
5438 * std: `std::num` has seen a reduction in the genericity of its traits,
5439 consolidating functionality into a few core traits.
5440 * std: Backtraces are now printed on task failure if the environment
5441 variable `RUST_BACKTRACE` is present.
5442 * std: Naming conventions for iterators have been standardized. More details
5443 can be found on the wiki's style guide.
5444 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5445 still implement the function.
5446 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5447 * std: `assert_approx_eq!` has been removed
5448 * std: The `e` and `E` formatting specifiers for floats have been added to
5449 print them in exponential notation.
5450 * std: The `Times` trait has been removed
5451 * std: Indications of variance and opting out of builtin bounds is done
5452 through marker types in `std::kinds::marker` now
5453 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5454 `#[deriving(Hash)]` is now possible.
5455 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5456 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5457 * std: `Chan::new` is now `channel()`.
5458 * std: A new synchronous channel type has been implemented.
5459 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5460 * std: `hashmap` and `trie` have been moved to `libcollections`
5461 * std: `run` has been rolled into `io::process`
5462 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5463 * std: The equality and comparison traits have seen some reorganization.
5464 * std: `rand` has moved to `librand`.
5465 * std: `to_{lower,upper}case` has been implemented for `char`.
5466 * std: Logging has been moved to `liblog`.
5467 * collections: `HashMap` has been rewritten for higher performance and less
5469 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5470 it can be booted manually. The runtime guide has more information and
5472 * native: All I/O functionality except signals has been implemented.
5473 * green: Task spawning with `libgreen` has been optimized with stack caching
5474 and various trimming of code.
5475 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5476 * sync: The `extra::sync` module has been updated to modern rust (and moved
5477 to the `sync` library), tweaking and improving various interfaces while
5478 dropping redundant functionality.
5479 * sync: A new `Barrier` type has been added to the `sync` library.
5480 * sync: An efficient mutex for native and green tasks has been implemented.
5481 * serialize: The `base64` module has seen some improvement. It treats
5482 newlines better, has non-string error values, and has seen general
5484 * fourcc: A `fourcc!` macro was introduced
5485 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5486 hexadecimal literal.
5489 * `rustpkg` has been deprecated and removed from the main repository. Its
5490 replacement, `cargo`, is under development.
5491 * Nightly builds of rust are now available
5492 * The memory usage of rustc has been improved many times throughout this
5494 * The build process supports disabling rpath support for the rustc binary
5496 * Code generation has improved in some cases, giving more information to the
5497 LLVM optimization passes to enable more extensive optimizations.
5498 * Debuginfo compatibility with lldb on OSX has been restored.
5499 * The master branch is now gated on an android bot, making building for
5500 android much more reliable.
5501 * Output flags have been centralized into one `--emit` flag.
5502 * Crate type flags have been centralized into one `--crate-type` flag.
5503 * Codegen flags have been consolidated behind a `-C` flag.
5504 * Linking against outdated crates now has improved error messages.
5505 * Error messages with lifetimes will often suggest how to annotate the
5506 function to fix the error.
5507 * Many more types are documented in the standard library, and new guides
5509 * Many `rustdoc` improvements:
5510 * code blocks are syntax highlighted.
5511 * render standalone markdown files.
5512 * the --test flag tests all code blocks by default.
5513 * exported macros are displayed.
5514 * re-exported types have their documentation inlined at the location of the
5516 * search works across crates that have been rendered to the same output
5520 Version 0.9 (2014-01-09)
5521 ==========================
5523 * ~1800 changes, numerous bugfixes
5526 * The `float` type has been removed. Use `f32` or `f64` instead.
5527 * A new facility for enabling experimental features (feature gating) has
5528 been added, using the crate-level `#[feature(foo)]` attribute.
5529 * Managed boxes (@) are now behind a feature gate
5530 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5531 standard library's `Gc` or `Rc` types instead.
5532 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5533 * Jumping back to the top of a loop is now done with `continue` instead of
5535 * Strings can no longer be mutated through index assignment.
5536 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5537 hash delimiters, as in `r###"foo"###`.
5538 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5540 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5541 * `@fn`s have been removed.
5542 * `do` only works with procs in order to make it obvious what the cost
5544 * Single-element tuple-like structs can no longer be dereferenced to
5545 obtain the inner value. A more comprehensive solution for overloading
5546 the dereference operator will be provided in the future.
5547 * The `#[link(...)]` attribute has been replaced with
5548 `#[crate_id = "name#vers"]`.
5549 * Empty `impl`s must be terminated with empty braces and may not be
5550 terminated with a semicolon.
5551 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5552 no longer has any special meaning.
5553 * The old `fmt!` string formatting macro has been removed.
5554 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5555 `print!` and `println!`.
5556 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5557 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5558 `extern mod foo = "bar"` instead.
5559 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5560 * Macros can have attributes.
5561 * Macros can expand to items with attributes.
5562 * Macros can expand to multiple items.
5563 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5564 * Comments may be nested.
5565 * Values automatically coerce to trait objects they implement, without
5567 * Enum discriminants are no longer an entire word but as small as needed to
5568 contain all the variants. The `repr` attribute can be used to override
5569 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5570 `#[repr(C)]` to match C enums.
5571 * Non-string literals are not allowed in attributes (they never worked).
5572 * The FFI now supports variadic functions.
5573 * Octal numeric literals, as in `0o7777`.
5574 * The `concat!` syntax extension performs compile-time string concatenation.
5575 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5576 removed as Rust no longer uses segmented stacks.
5577 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5578 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5579 not `*`; ignoring remaining fields of a struct is also done with `..`,
5580 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5581 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5582 * `rustc` supports the "system" calling convention, which defaults to the
5583 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5585 * The `type_overflow` lint (default: warn) checks literals for overflow.
5586 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5587 * The `attribute_usage` lint (default: warn) warns about unknown
5589 * The `unknown_features` lint (default: warn) warns about unknown
5591 * The `dead_code` lint (default: warn) checks for dead code.
5592 * Rust libraries can be linked statically to one another
5593 * `#[link_args]` is behind the `link_args` feature gate.
5594 * Native libraries are now linked with `#[link(name = "foo")]`
5595 * Native libraries can be statically linked to a rust crate
5596 (`#[link(name = "foo", kind = "static")]`).
5597 * Native OS X frameworks are now officially supported
5598 (`#[link(name = "foo", kind = "framework")]`).
5599 * The `#[thread_local]` attribute creates thread-local (not task-local)
5600 variables. Currently behind the `thread_local` feature gate.
5601 * The `return` keyword may be used in closures.
5602 * Types that can be copied via a memcpy implement the `Pod` kind.
5603 * The `cfg` attribute can now be used on struct fields and enum variants.
5606 * std: The `option` and `result` API's have been overhauled to make them
5607 simpler, more consistent, and more composable.
5608 * std: The entire `std::io` module has been replaced with one that is
5609 more comprehensive and that properly interfaces with the underlying
5610 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5612 * std: `io::util` contains a number of useful implementations of
5613 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5614 `ZeroReader`, `TeeReader`.
5615 * std: The reference counted pointer type `extra::rc` moved into std.
5616 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5617 just a wrapper around it).
5618 * std: The `Either` type has been removed.
5619 * std: `fmt::Default` can be implemented for any type to provide default
5620 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
5621 * std: The `rand` API continues to be tweaked.
5622 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
5623 on failure in gdb, is now named `rust_fail`.
5624 * std: The `each_key` and `each_value` methods on `HashMap` have been
5625 replaced by the `keys` and `values` iterators.
5626 * std: Functions dealing with type size and alignment have moved from the
5627 `sys` module to the `mem` module.
5628 * std: The `path` module was written and API changed.
5629 * std: `str::from_utf8` has been changed to cast instead of allocate.
5630 * std: `starts_with` and `ends_with` methods added to vectors via the
5631 `ImmutableEqVector` trait, which is in the prelude.
5632 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
5633 if the index is out of bounds.
5634 * std: Task failure no longer propagates between tasks, as the model was
5635 complex, expensive, and incompatible with thread-based tasks.
5636 * std: The `Any` type can be used for dynamic typing.
5637 * std: `~Any` can be passed to the `fail!` macro and retrieved via
5639 * std: Methods that produce iterators generally do not have an `_iter`
5641 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
5642 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
5643 * std: `util::ignore` renamed to `prelude::drop`.
5644 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
5646 * std: `vec::raw` has seen a lot of cleanup and API changes.
5647 * std: The standard library no longer includes any C++ code, and very
5648 minimal C, eliminating the dependency on libstdc++.
5649 * std: Runtime scheduling and I/O functionality has been factored out into
5650 extensible interfaces and is now implemented by two different crates:
5651 libnative, for native threading and I/O; and libgreen, for green threading
5652 and I/O. This paves the way for using the standard library in more limited
5653 embedded environments.
5654 * std: The `comm` module has been rewritten to be much faster, have a
5655 simpler, more consistent API, and to work for both native and green
5657 * std: All libuv dependencies have been moved into the rustuv crate.
5658 * native: New implementations of runtime scheduling on top of OS threads.
5659 * native: New native implementations of TCP, UDP, file I/O, process spawning,
5661 * green: The green thread scheduler and message passing types are almost
5663 * extra: The `flatpipes` module had bitrotted and was removed.
5664 * extra: All crypto functions have been removed and Rust now has a policy of
5665 not reimplementing crypto in the standard library. In the future crypto
5666 will be provided by external crates with bindings to established libraries.
5667 * extra: `c_vec` has been modernized.
5668 * extra: The `sort` module has been removed. Use the `sort` method on
5672 * The `rust` and `rusti` commands have been removed, due to lack of
5674 * `rustdoc` was completely rewritten.
5675 * `rustdoc` can test code examples in documentation.
5676 * `rustpkg` can test packages with the argument, 'test'.
5677 * `rustpkg` supports arbitrary dependencies, including C libraries.
5678 * `rustc`'s support for generating debug info is improved again.
5679 * `rustc` has better error reporting for unbalanced delimiters.
5680 * `rustc`'s JIT support was removed due to bitrot.
5681 * Executables and static libraries can be built with LTO (-Z lto)
5682 * `rustc` adds a `--dep-info` flag for communicating dependencies to
5686 Version 0.8 (2013-09-26)
5687 ============================
5689 * ~2200 changes, numerous bugfixes
5692 * The `for` loop syntax has changed to work with the `Iterator` trait.
5693 * At long last, unwinding works on Windows.
5694 * Default methods are ready for use.
5695 * Many trait inheritance bugs fixed.
5696 * Owned and borrowed trait objects work more reliably.
5697 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
5698 * rustc can omit emission of code for the `debug!` macro if it is passed
5700 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
5701 for foo.rs, then foo/mod.rs, and will generate an error when both are
5703 * Strings no longer contain trailing nulls. The new `std::c_str` module
5704 provides new mechanisms for converting to C strings.
5705 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
5706 * The FFI has been overhauled such that foreign functions are called directly,
5707 instead of through a stack-switching wrapper.
5708 * Calling a foreign function must be done through a Rust function with the
5709 `#[fixed_stack_segment]` attribute.
5710 * The `externfn!` macro can be used to declare both a foreign function and
5711 a `#[fixed_stack_segment]` wrapper at once.
5712 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
5713 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5714 * `priv` is disallowed everywhere except for struct fields and enum variants.
5715 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5716 * `ref` bindings in irrefutable patterns work correctly now.
5717 * `char` is now prevented from containing invalid code points.
5718 * Casting to `bool` is no longer allowed.
5719 * `\0` is now accepted as an escape in chars and strings.
5720 * `yield` is a reserved keyword.
5721 * `typeof` is a reserved keyword.
5722 * Crates may be imported by URL with `extern mod foo = "url";`.
5723 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5724 * Static vectors can be initialized with repeating elements,
5725 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5726 * Static structs can be initialized with functional record update,
5727 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5728 * `cfg!` can be used to conditionally execute code based on the crate
5729 configuration, similarly to `#[cfg(...)]`.
5730 * The `unnecessary_qualification` lint detects unneeded module
5731 prefixes (default: allow).
5732 * Arithmetic operations have been implemented on the SIMD types in
5733 `std::unstable::simd`.
5734 * Exchange allocation headers were removed, reducing memory usage.
5735 * `format!` implements a completely new, extensible, and higher-performance
5736 string formatting system. It will replace `fmt!`.
5737 * `print!` and `println!` write formatted strings (using the `format!`
5738 extension) to stdout.
5739 * `write!` and `writeln!` write formatted strings (using the `format!`
5740 extension) to the new Writers in `std::rt::io`.
5741 * The library section in which a function or static is placed may
5742 be specified with `#[link_section = "..."]`.
5743 * The `proto!` syntax extension for defining bounded message protocols
5745 * `macro_rules!` is hygienic for `let` declarations.
5746 * The `#[export_name]` attribute specifies the name of a symbol.
5747 * `unreachable!` can be used to indicate unreachable code, and fails
5751 * std: Transitioned to the new runtime, written in Rust.
5752 * std: Added an experimental I/O library, `rt::io`, based on the new
5754 * std: A new generic `range` function was added to the prelude, replacing
5755 `uint::range` and friends.
5756 * std: `range_rev` no longer exists. Since range is an iterator it can be
5757 reversed with `range(lo, hi).invert()`.
5758 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5759 renamed to `unwrap_or`.
5760 * std: The `iterator` module was renamed to `iter`.
5761 * std: Integral types now support the `checked_add`, `checked_sub`, and
5762 `checked_mul` operations for detecting overflow.
5763 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5765 * std: Methods are standardizing on conventions for casting methods:
5766 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5768 * std: The `CString` type in `c_str` provides new ways to convert to and
5770 * std: `DoubleEndedIterator` can yield elements in two directions.
5771 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5773 * std: `str::from_bytes` renamed to `str::from_utf8`.
5774 * std: `pop_opt` and `shift_opt` methods added to vectors.
5775 * std: The task-local data interface no longer uses @, and keys are
5776 no longer function pointers.
5777 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5778 * std: Added `SharedPort` to `comm`.
5779 * std: `Eq` has a default method for `ne`; only `eq` is required
5781 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5782 is required in implementations.
5783 * std: `is_utf8` performance is improved, impacting many string functions.
5784 * std: `os::MemoryMap` provides cross-platform mmap.
5785 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5786 are not 'in-bounds' are considered undefined.
5787 * std: Many freestanding functions in `vec` removed in favor of methods.
5788 * std: Many freestanding functions on scalar types removed in favor of
5790 * std: Many options to task builders were removed since they don't make
5791 sense in the new scheduler design.
5792 * std: More containers implement `FromIterator` so can be created by the
5794 * std: More complete atomic types in `unstable::atomics`.
5795 * std: `comm::PortSet` removed.
5796 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5797 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5798 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5799 default implementations.
5800 * std: Various `from_str` functions were removed in favor of a generic
5801 `from_str` which is available in the prelude.
5802 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5803 * extra: `dlist`, the doubly-linked list was modernized.
5804 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5805 * extra: Added `glob` module, replacing `std::os::glob`.
5806 * extra: `rope` was removed.
5807 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5808 * extra: `net`, and `timer` were removed. The experimental replacements
5809 are `std::rt::io::net` and `std::rt::io::timer`.
5810 * extra: Iterators implemented for `SmallIntMap`.
5811 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5812 * extra: `SmallIntSet` removed. Use `BitvSet`.
5813 * extra: Performance of JSON parsing greatly improved.
5814 * extra: `semver` updated to SemVer 2.0.0.
5815 * extra: `term` handles more terminals correctly.
5816 * extra: `dbg` module removed.
5817 * extra: `par` module removed.
5818 * extra: `future` was cleaned up, with some method renames.
5819 * extra: Most free functions in `getopts` were converted to methods.
5822 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
5823 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
5824 similarly to gcc's `--march` flag.
5825 * rustc's performance compiling small crates is much better.
5826 * rustpkg has received many improvements.
5827 * rustpkg supports git tags as package IDs.
5828 * rustpkg builds into target-specific directories so it can be used for
5830 * The number of concurrent test tasks is controlled by the environment
5831 variable RUST_TEST_TASKS.
5832 * The test harness can now report metrics for benchmarks.
5833 * All tools have man pages.
5834 * Programs compiled with `--test` now support the `-h` and `--help` flags.
5835 * The runtime uses jemalloc for allocations.
5836 * Segmented stacks are temporarily disabled as part of the transition to
5837 the new runtime. Stack overflows are possible!
5838 * A new documentation backend, rustdoc_ng, is available for use. It is
5839 still invoked through the normal `rustdoc` command.
5842 Version 0.7 (2013-07-03)
5843 =======================
5845 * ~2000 changes, numerous bugfixes
5848 * `impl`s no longer accept a visibility qualifier. Put them on methods
5850 * The borrow checker has been rewritten with flow-sensitivity, fixing
5851 many bugs and inconveniences.
5852 * The `self` parameter no longer implicitly means `&'self self`,
5853 and can be explicitly marked with a lifetime.
5854 * Overloadable compound operators (`+=`, etc.) have been temporarily
5855 removed due to bugs.
5856 * The `for` loop protocol now requires `for`-iterators to return `bool`
5857 so they compose better.
5858 * The `Durable` trait is replaced with the `'static` bounds.
5859 * Trait default methods work more often.
5860 * Structs with the `#[packed]` attribute have byte alignment and
5861 no padding between fields.
5862 * Type parameters bound by `Copy` must now be copied explicitly with
5864 * It is now illegal to move out of a dereferenced unsafe pointer.
5865 * `Option<~T>` is now represented as a nullable pointer.
5866 * `@mut` does dynamic borrow checks correctly.
5867 * The `main` function is only detected at the topmost level of the crate.
5868 The `#[main]` attribute is still valid anywhere.
5869 * Struct fields may no longer be mutable. Use inherited mutability.
5870 * The `#[no_send]` attribute makes a type that would otherwise be
5872 * The `#[no_freeze]` attribute makes a type that would otherwise be
5874 * Unbounded recursion will abort the process after reaching the limit
5875 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
5876 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
5877 are never implicitly copyable.
5878 * `#[static_assert]` makes compile-time assertions about static bools.
5879 * At long last, 'argument modes' no longer exist.
5880 * The rarely used `use mod` statement no longer exists.
5883 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
5885 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
5886 `Rand`, `Zero` and `ToStr` can all be automatically derived with
5888 * The `bytes!` macro returns a vector of bytes for string, u8, char,
5889 and unsuffixed integer literals.
5892 * The `core` crate was renamed to `std`.
5893 * The `std` crate was renamed to `extra`.
5894 * More and improved documentation.
5895 * std: `iterator` module for external iterator objects.
5896 * Many old-style (internal, higher-order function) iterators replaced by
5897 implementations of `Iterator`.
5898 * std: Many old internal vector and string iterators,
5899 incl. `any`, `all`. removed.
5900 * std: The `finalize` method of `Drop` renamed to `drop`.
5901 * std: The `drop` method now takes `&mut self` instead of `&self`.
5902 * std: The prelude no longer re-exports any modules, only types and traits.
5903 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
5904 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
5905 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
5906 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
5907 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
5908 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
5909 * std: Many types implement `Clone`.
5910 * std: `path` type renamed to `Path`.
5911 * std: `mut` module and `Mut` type removed.
5912 * std: Many standalone functions removed in favor of methods and iterators
5913 in `vec`, `str`. In the future methods will also work as functions.
5914 * std: `reinterpret_cast` removed. Use `transmute`.
5915 * std: ascii string handling in `std::ascii`.
5916 * std: `Rand` is implemented for ~/@.
5917 * std: `run` module for spawning processes overhauled.
5918 * std: Various atomic types added to `unstable::atomic`.
5919 * std: Various types implement `Zero`.
5920 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
5921 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
5922 * std: Added `os::mkdir_recursive`.
5923 * std: Added `os::glob` function performs filesystems globs.
5924 * std: `FuzzyEq` renamed to `ApproxEq`.
5925 * std: `Map` now defines `pop` and `swap` methods.
5926 * std: `Cell` constructors converted to static methods.
5927 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
5928 * extra: `flate` module moved from `std` to `extra`.
5929 * extra: `fileinput` module for iterating over a series of files.
5930 * extra: `Complex` number type and `complex` module.
5931 * extra: `Rational` number type and `rational` module.
5932 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
5933 * extra: `term` uses terminfo now, is more correct.
5934 * extra: `arc` functions converted to methods.
5935 * extra: Implementation of fixed output size variations of SHA-2.
5938 * `unused_variable` lint mode for unused variables (default: warn).
5939 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
5941 * `unused_mut` lint mode for identifying unused `mut` qualifiers
5943 * `dead_assignment` lint mode for unread variables (default: warn).
5944 * `unnecessary_allocation` lint mode detects some heap allocations that are
5945 immediately borrowed so could be written without allocating (default: warn).
5946 * `missing_doc` lint mode (default: allow).
5947 * `unreachable_code` lint mode (default: warn).
5948 * The `rusti` command has been rewritten and a number of bugs addressed.
5949 * rustc outputs in color on more terminals.
5950 * rustc accepts a `--link-args` flag to pass arguments to the linker.
5951 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
5952 * Compiling with `-g` will make the binary record information about
5953 dynamic borrowcheck failures for debugging.
5954 * rustdoc has a nicer stylesheet.
5955 * Various improvements to rustdoc.
5956 * Improvements to rustpkg (see the detailed release notes).
5959 Version 0.6 (2013-04-03)
5960 ========================
5962 * ~2100 changes, numerous bugfixes
5965 * The self type parameter in traits is now spelled `Self`
5966 * The `self` parameter in trait and impl methods must now be explicitly
5967 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
5968 * Static methods no longer require the `static` keyword and instead
5969 are distinguished by the lack of a `self` parameter
5970 * Replaced the `Durable` trait with the `'static` lifetime
5971 * The old closure type syntax with the trailing sigil has been
5972 removed in favor of the more consistent leading sigil
5973 * `super` is a keyword, and may be prefixed to paths
5974 * Trait bounds are separated with `+` instead of whitespace
5975 * Traits are implemented with `impl Trait for Type`
5976 instead of `impl Type: Trait`
5977 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
5978 * The `export` keyword has finally been removed
5979 * The `move` keyword has been removed (see "Semantic changes")
5980 * The interior mutability qualifier on vectors, `[mut T]`, has been
5981 removed. Use `&mut [T]`, etc.
5982 * `mut` is no longer valid in `~mut T`. Use inherited mutability
5983 * `fail` is no longer a keyword. Use `fail!()`
5984 * `assert` is no longer a keyword. Use `assert!()`
5985 * `log` is no longer a keyword. use `debug!`, etc.
5986 * 1-tuples may be represented as `(T,)`
5987 * Struct fields may no longer be `mut`. Use inherited mutability,
5988 `@mut T`, `core::mut` or `core::cell`
5989 * `extern mod { ... }` is no longer valid syntax for foreign
5990 function modules. Use extern blocks: `extern { ... }`
5991 * Newtype enums removed. Use tuple-structs.
5992 * Trait implementations no longer support visibility modifiers
5993 * Pattern matching over vectors improved and expanded
5994 * `const` renamed to `static` to correspond to lifetime name,
5995 and make room for future `static mut` unsafe mutable globals.
5996 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
5997 * `Clone` implementations can be automatically generated with
5998 `#[deriving(Clone)]`
5999 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6000 instead of `foo as Bar`.
6001 * Fixed length vector types are now written as `[int, .. 3]`
6002 instead of `[int * 3]`.
6003 * Fixed length vector types can express the length as a constant
6004 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6007 * Types with owned pointers or custom destructors move by default,
6008 eliminating the `move` keyword
6009 * All foreign functions are considered unsafe
6010 * &mut is now unaliasable
6011 * Writes to borrowed @mut pointers are prevented dynamically
6013 * The name of the main function can be customized using #[main]
6014 * The default type of an inferred closure is &fn instead of @fn
6015 * `use` statements may no longer be "chained" - they cannot import
6016 identifiers imported by previous `use` statements
6017 * `use` statements are crate relative, importing from the "top"
6018 of the crate by default. Paths may be prefixed with `super::`
6019 or `self::` to change the search behavior.
6020 * Method visibility is inherited from the implementation declaration
6021 * Structural records have been removed
6022 * Many more types can be used in static items, including enums
6023 'static-lifetime pointers and vectors
6024 * Pattern matching over vectors improved and expanded
6025 * Typechecking of closure types has been overhauled to
6026 improve inference and eliminate unsoundness
6027 * Macros leave scope at the end of modules, unless that module is
6028 tagged with #[macro_escape]
6031 * Added big integers to `std::bigint`
6032 * Removed `core::oldcomm` module
6033 * Added pipe-based `core::comm` module
6034 * Numeric traits have been reorganized under `core::num`
6035 * `vec::slice` finally returns a slice
6036 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6037 * Containers reorganized around traits in `core::container`
6038 * `core::dvec` removed, `~[T]` is a drop-in replacement
6039 * `core::send_map` renamed to `core::hashmap`
6040 * `std::map` removed; replaced with `core::hashmap`
6041 * `std::treemap` reimplemented as an owned balanced tree
6042 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6043 * `core::trie` added as a fast ordered map for integer keys
6044 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6045 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6046 overload the comparison operators, whereas `TotalOrd` is used
6047 by certain container types
6050 * Replaced the 'cargo' package manager with 'rustpkg'
6051 * Added all-purpose 'rust' tool
6052 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6053 * rustc now *attempts* to offer spelling suggestions
6054 * Improved support for ARM and Android
6055 * Preliminary MIPS backend
6056 * Improved foreign function ABI implementation for x86, x86_64
6057 * Various memory usage improvements
6058 * Rust code may be embedded in foreign code under limited circumstances
6059 * Inline assembler supported by new asm!() syntax extension.
6062 Version 0.5 (2012-12-21)
6063 ===========================
6065 * ~900 changes, numerous bugfixes
6068 * Removed `<-` move operator
6069 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6070 * Removed old fixed length vector syntax - `[T]/N`
6071 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6072 * Macros may now expand to items and statements
6073 * `a.b()` is always parsed as a method call, never as a field projection
6074 * `Eq` and `IterBytes` implementations can be automatically generated
6075 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6076 * Removed the special crate language for `.rc` files
6077 * Function arguments may consist of any irrefutable pattern
6080 * `&` and `~` pointers may point to objects
6081 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6082 * Enum variants may be structs
6083 * Destructors can be added to all nominal types with the Drop trait
6084 * Structs and nullary enum variants may be constants
6085 * Values that cannot be implicitly copied are now automatically moved
6086 without writing `move` explicitly
6087 * `&T` may now be coerced to `*T`
6088 * Coercions happen in `let` statements as well as function calls
6089 * `use` statements now take crate-relative paths
6090 * The module and type namespaces have been merged so that static
6091 method names can be resolved under the trait in which they are
6094 * Improved support for language features
6095 * Trait inheritance works in many scenarios
6096 * More support for explicit self arguments in methods - `self`, `&self`
6097 `@self`, and `~self` all generally work as expected
6098 * Static methods work in more situations
6099 * Experimental: Traits may declare default methods for the implementations
6103 * New condition handling system in `core::condition`
6104 * Timsort added to `std::sort`
6105 * New priority queue, `std::priority_queue`
6106 * Pipes for serializable types, `std::flatpipes'
6107 * Serialization overhauled to be trait-based
6108 * Expanded `getopts` definitions
6109 * Moved futures to `std`
6110 * More functions are pure now
6111 * `core::comm` renamed to `oldcomm`. Still deprecated
6112 * `rustdoc` and `cargo` are libraries now
6115 * Added a preliminary REPL, `rusti`
6116 * License changed from MIT to dual MIT/APL2
6119 Version 0.4 (2012-10-15)
6120 ==========================
6122 * ~2000 changes, numerous bugfixes
6125 * All keywords are now strict and may not be used as identifiers anywhere
6126 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6127 'of', 'with', 'to', 'class'.
6128 * Classes are replaced with simpler structs
6129 * Explicit method self types
6130 * `ret` became `return` and `alt` became `match`
6131 * `import` is now `use`; `use is now `extern mod`
6132 * `extern mod { ... }` is now `extern { ... }`
6133 * `use mod` is the recommended way to import modules
6134 * `pub` and `priv` replace deprecated export lists
6135 * The syntax of `match` pattern arms now uses fat arrow (=>)
6136 * `main` no longer accepts an args vector; use `os::args` instead
6139 * Trait implementations are now coherent, ala Haskell typeclasses
6140 * Trait methods may be static
6141 * Argument modes are deprecated
6142 * Borrowed pointers are much more mature and recommended for use
6143 * Strings and vectors in the static region are stored in constant memory
6144 * Typestate was removed
6145 * Resolution rewritten to be more reliable
6146 * Support for 'dual-mode' data structures (freezing and thawing)
6149 * Most binary operators can now be overloaded via the traits in
6151 * `std::net::url` for representing URLs
6152 * Sendable hash maps in `core::send_map`
6153 * `core::task' gained a (currently unsafe) task-local storage API
6156 * An efficient new intertask communication primitive called the pipe,
6157 along with a number of higher-level channel types, in `core::pipes`
6158 * `std::arc`, an atomically reference counted, immutable, shared memory
6160 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6161 * Futures are now based on pipes and sendable
6162 * More robust linked task failure
6163 * Improved task builder API
6166 * Improved error reporting
6167 * Preliminary JIT support
6168 * Preliminary work on precise GC
6169 * Extensive architectural improvements to rustc
6170 * Begun a transition away from buggy C++-based reflection (shape) code to
6171 Rust-based (visitor) code
6172 * All hash functions and tables converted to secure, randomized SipHash
6175 Version 0.3 (2012-07-12)
6176 ========================
6178 * ~1900 changes, numerous bugfixes
6180 * New coding conveniences
6181 * Integer-literal suffix inference
6182 * Per-item control over warnings, errors
6183 * #[cfg(windows)] and #[cfg(unix)] attributes
6184 * Documentation comments
6185 * More compact closure syntax
6186 * 'do' expressions for treating higher-order functions as
6188 * *-patterns (wildcard extended to all constructor fields)
6191 * Name resolution pass and exhaustiveness checker rewritten
6192 * Region pointers and borrow checking supersede alias
6194 * Init-ness checking is now provided by a region-based liveness
6195 pass instead of the typestate pass; same for last-use analysis
6196 * Extensive work on region pointers
6198 * Experimental new language features
6199 * Slices and fixed-size, interior-allocated vectors
6200 * #!-comments for lang versioning, shell execution
6201 * Destructors and iface implementation for classes;
6202 type-parameterized classes and class methods
6203 * 'const' type kind for types that can be used to implement
6204 shared-memory concurrency patterns
6208 * Removal of various obsolete features
6209 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6210 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6212 * Constructs: do-while loops ('do' repurposed), fn binding,
6213 resources (replaced by destructors)
6215 * Compiler reorganization
6216 * Syntax-layer of compiler split into separate crate
6217 * Clang (from LLVM project) integrated into build
6218 * Typechecker split into sub-modules
6221 * New time functions
6222 * Extension methods for many built-in types
6223 * Arc: atomic-refcount read-only / exclusive-use shared cells
6224 * Par: parallel map and search routines
6225 * Extensive work on libuv interface
6226 * Much vector code moved to libraries
6227 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6228 #include, #include_str, #include_bin
6231 * Cargo automatically resolves dependencies
6234 Version 0.2 (2012-03-29)
6235 =========================
6237 * >1500 changes, numerous bugfixes
6239 * New docs and doc tooling
6241 * New port: FreeBSD x86_64
6243 * Compilation model enhancements
6244 * Generics now specialized, multiply instantiated
6245 * Functions now inlined across separate crates
6247 * Scheduling, stack and threading fixes
6248 * Noticeably improved message-passing performance
6249 * Explicit schedulers
6253 * Experimental new language features
6254 * Operator overloading
6258 * Various language extensions
6259 * C-callback function types: 'crust fn ...'
6260 * Infinite-loop construct: 'loop { ... }'
6261 * Shorten 'mutable' to 'mut'
6262 * Required mutable-local qualifier: 'let mut ...'
6263 * Basic glob-exporting: 'export foo::*;'
6264 * Alt now exhaustive, 'alt check' for runtime-checked
6265 * Block-function form of 'for' loop, with 'break' and 'ret'.
6268 * AST quasi-quote syntax extension
6269 * Revived libuv interface
6270 * New modules: core::{future, iter}, std::arena
6271 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6272 * Extensive cleanup, regularization in libstd, libcore
6275 Version 0.1 (2012-01-20)
6276 ===============================
6278 * Most language features work, including:
6279 * Unique pointers, unique closures, move semantics
6280 * Interface-constrained generics
6281 * Static interface dispatch
6283 * Multithread task scheduling
6284 * Typestate predicates
6285 * Failure unwinding, destructors
6286 * Pattern matching and destructuring assignment
6287 * Lightweight block-lambda syntax
6288 * Preliminary macro-by-example
6290 * Compiler works with the following configurations:
6291 * Linux: x86 and x86_64 hosts and targets
6292 * macOS: x86 and x86_64 hosts and targets
6293 * Windows: x86 hosts and targets
6295 * Cross compilation / multi-target configuration supported.
6297 * Preliminary API-documentation and package-management tools included.
6301 * Documentation is incomplete.
6303 * Performance is below intended target.
6305 * Standard library APIs are subject to extensive change, reorganization.
6307 * Language-level versioning is not yet operational - future code will